PROSPECTUS FILED PURSUANT TO RULE 424(B)(3)

                       LIGAND PHARMACEUTICALS INCORPORATED

                                                FILED PURSUANT TO RULE 424(B)(3)
                                                     REGISTRATION NO. 333-131029

                           PROSPECTUS SUPPLEMENT NO. 7
    (TO PROSPECTUS DATED APRIL 12, 2006, AS SUPPLEMENTED AND AMENDED BY THAT
   PROSPECTUS SUPPLEMENT NO. 1 DATED MAY 15, 2006, THAT PROSPECTUS SUPPLEMENT
NO. 2 DATED JUNE 12, 2006, THAT PROSPECTUS SUPPLEMENT NO. 3 DATED JUNE 29, 2006,
     THAT PROSPECTUS SUPPLEMENT NO. 4 DATED AUGUST 4, 2006, THAT PROSPECTUS
  SUPPLEMENT NO. 5 DATED AUGUST 9, 2006, AND THAT PROSPECTUS SUPPLEMENT NO. 6
                             DATED AUGUST 30, 2006)

         This Prospectus Supplement No. 7 supplements and amends the prospectus
dated April 12, 2006 (as supplemented and amended by that Prospectus Supplement
No. 1 dated May 15, 2006, that Prospectus Supplement No. 2 dated June 12, 2006,
that Prospectus Supplement No. 3 dated June 29, 2006, that Prospectus Supplement
No. 4 dated August 4, 2006, that Prospectus Supplement No. 5 dated August 9,
2006, and that Prospectus Supplement No. 6 dated August 30, 2006), or the
Prospectus, relating to the offer and sale of up to 7,790,974 shares of our
common stock to be issued pursuant to awards granted or to be granted under our
2002 Stock Incentive Plan, or our 2002 Plan, up to 147,510 shares of our common
stock to be issued pursuant to our 2002 Employee Stock Purchase Plan, or our
2002 ESPP, and up to 50,309 shares of our common stock which may be offered from
time to time by the selling stockholders identified on page 110 of the
Prospectus for their own accounts. Each of the selling stockholders named in the
Prospectus acquired the shares of common stock upon exercise of options
previously granted to them as an employee, director or consultant of Ligand or
as restricted stock granted to them as a director of Ligand, in each case under
the terms of our 2002 Plan. We will not receive any of the proceeds from the
sale of the shares of our common stock by the selling stockholders under the
Prospectus. We will receive proceeds in connection with option exercises under
the 2002 Plan and shares issued under the 2002 ESPP which will be based upon
each granted option exercise price or purchase price, as applicable.

         This Prospectus Supplement No. 7 includes the attached Current Report
on Form 8-K of Ligand Pharmaceuticals Incorporated dated September 8, 2006 and
the attached two Current Reports on Form 8-K of Ligand Pharmaceuticals
Incorporated dated September 11, 2006, as filed by us with the Securities and
Exchange Commission.

         This Prospectus Supplement No. 7 should be read in conjunction with,
and delivered with, the Prospectus and is qualified by reference to the
Prospectus, except to the extent that the information in this Prospectus
Supplement No. 7 updates or supersedes the information contained in the
Prospectus.

         Our common stock is quoted on the Nasdaq Global Market under the symbol
"LGND." On September 8, 2006, the last reported sale price of our common stock
on the Nasdaq Global Market was $10.56 per share.

         INVESTING IN OUR COMMON STOCK INVOLVES RISK. SEE "RISK FACTORS"
BEGINNING ON PAGE 7 OF THE PROSPECTUS AND BEGINNING ON PAGE 52 OF PROSPECTUS
SUPPLEMENT NO. 5.

         Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or determined if the
Prospectus or this Prospectus Supplement No. 7 is truthful or complete. Any
representation to the contrary is a criminal offense.

       The date of this Prospectus Supplement No. 7 is September 11, 2006.




                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                                 ---------------


                                    FORM 8-K

                                 CURRENT REPORT


     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

       Date of Report (Date of earliest event reported): September 7, 2006

                       LIGAND PHARMACEUTICALS INCORPORATED
             (Exact name of registrant as specified in its charter)

                                    DELAWARE
                 (State or other jurisdiction of incorporation)

                                    000-20720
                            (Commission File Number)

                           10275 Science Center Drive,
                              San Diego, California

                    (Address of principal executive offices)
       (858) 550-7500 (Registrant's telephone number, including area code)

                                   77-0160744
                      (I.R.S. Employer Identification No.)

                                   92121-1117
                                   (Zip Code)



                           __________________________





Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

|_| Written communications pursuant to Rule 425 under the Securities Act (17 CFR
    230.425)

|X| Soliciting material pursuant to Rule 14a-12 under the Exchange Act 17 CFR
    240.14a-12)

|_| Pre-commencement communications pursuant to Rule 14d-2(b) under
    the Exchange Act (17 CFR 240.14d-2(b))

|_| Pre-commencement communications pursuant to Rule 13e-4(c) under the
    Exchange Act (17 CFR 240.13e-4(c))

_______________________________________________________________________________




ITEM 8.01. Other Events.

AVINZA

On September 7, 2006, Ligand Pharmaceuticals Incorporated ("Ligand") announced
that it had entered into a definitive asset purchase agreement with King
Pharmaceuticals, Inc. and King Pharmaceuticals Research and Development, Inc.
(together, "King"), dated as of September 6, 2006, which provides for the sale
of Ligand's AVINZA (morphine sulfate extended-release capsules) product and
related assets to King, subject to the terms and conditions of the agreement,
and, in addition, King announced that it had entered into a separate contract
sales agreement with King Pharmaceuticals, Inc., subject to the terms and
conditions contained therein (collectively, the "King Transaction"). The press
release issued by Ligand announcing the King Transaction is attached as Exhibit
99.1 hereto. Ligand intends to file the definitive purchase and contract sales
agreements on a subsequent form 8-K.


Oncology Product Line

On September 7, 2006, Ligand announced that it had entered into a definitive
agreement to sell its oncology product line and the associated assets to Eisai
Co., Ltd. (Tokyo) and Eisai Inc. (New Jersey) (together, "Eisai"), subject to
the terms and conditions contained therein. The press release announcing this
transaction is attached as Exhibit 99.2. The company intends to file the
definitive purchase agreement on a subsequent form 8-K.


           IMPORTANT ADDITIONAL INFORMATION WILL BE FILED WITH THE SEC

Ligand and its board of directors intends to file with the Securities and
Exchange Commission and mail to its stockholders a Proxy Statement in connection
with the King Transaction. The Proxy Statement will contain important
information about Ligand, King, the King Transaction and related matters.
Investors and security holders are urged to read the Proxy Statement carefully
when it is available.

Investors and security holders will be able to obtain copies of the Proxy
Statement free of charge and other documents filed with the SEC by Ligand and
King through the web site maintained by the SEC at www.sec.gov. In addition,
investors and security holders will be able to obtain copies of the Proxy
Statement free of charge from Ligand by contacting Ligand Pharmaceuticals
Incorporated, Attn: Investor Relations, 10275 Science Center Drive, San Diego,
California 92121-1117, (858) 550-7500.

Ligand and its directors and executive officers may be deemed to be participants
in the solicitation of proxies in respect of the King Transaction. Information
regarding Ligand's directors and executive officers is contained in Ligand's
Form 10-K for the year ended December 31, 2005, and in Reports on Form 8-K filed
with the SEC from time to time. As of August 31, 2006, Ligand's directors and
executive officers beneficially owned approximately 9,695,891 shares, or 11.99%
of,Ligand's common stock. A more complete description will be available in the
Proxy Statement. Investors and security holders are urged to read the Proxy
Statement and the other relevant materials (when they become available) before
making any voting or investment decision with respect to the King Transaction.

Item 9.01 Financial Statements And Exhibits

(d)      Exhibits

EXHIBIT NUMBER             DESCRIPTION
---------------            -----------


99.1                      Press release of the Company dated September 7, 2006
                          (AVINZA transaction)

99.2                      Press release of the Company dated September 7, 2006
                          (Oncology transaction)



                                   SIGNATURES

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned duly authorized.


                            LIGAND PHARMACEUTICALS INCORPORATED




Date : September 8, 2006    By:     /s/ Warner R. Broaddus
                            Name:   Warner R. Broaddus
                            Title:  Vice President, General Counsel & Secretary







                                  EXHIBIT INDEX

EXHIBIT NUMBER            DESCRIPTION
--------------            -----------

99.1                      Press release of the Company dated September 7, 2006
                          (AVINZA transaction)

99.2                      Press release of the Company dated September 7, 2006
                          (Oncology transaction)



                                                                    EXHIBIT 99.1

                        LIGAND ANNOUNCES SALE OF AVINZA


SAN DIEGO, CA SEPTEMBER 7, 2006---Ligand Pharmaceuticals Incorporated (NASDAQ:
LGND) (the "Company" or "Ligand") announced today that it has signed a
definitive asset purchase agreement to transfer the assets associated with
AVINZA (morphine sulfate extended-release capsules) to King Pharmaceuticals,
Inc. ("King"). The purchase price is a combination of aggregate up-front cash
consideration of $313 million, plus a tiered royalty agreement which survives
until the patent expiration in November 2017.

Under the terms of the asset purchase agreement King will make a $265 million
payment to Ligand to acquire all rights to AVINZA in the United States, its
territories and Canada. In addition, King will assume a product-related
liability owed to Organon totaling $48 million and all other existing product
royalty obligations.

In addition to existing royalty obligations, King will pay Ligand a 15 percent
royalty during the first 20 months after the closing date. Subsequent royalty
payments will be based upon calendar year net sales. If calendar year net sales
are less than $200 million the royalty payment will be 5 percent of all net
sales. If calendar year net sales are greater than $200 million then the royalty
payment will be 10% of all net sales less than $250 million, plus 15 percent of
net sales greater than $250 million.

In addition, Ligand announced that it has entered into a separate contract sales
agreement under which King has been granted the right to and will promote AVINZA
during a transition period until closing of the asset purchase agreement.

"The AVINZA bidding process was a competitive one, and we are pleased that our
efforts have resulted in this exciting business opportunity with King" said
Henry F. Blissenbach, Ligand Chairman and Interim CEO. "We believe Ligand
shareholders will greatly benefit from the up front consideration received as
well as the upside royalty stream potential King offers with AVINZA, through
their committed, large and well-


respected primary care and neuroscience salesforces and support infrastructure,
established physician relationships, and financial strength. Indeed, given
King's demonstrated ability to maximize the value of the products they promote
under the leadership of President and Chief Executive Officer Brian Markison,
we believe that the net present value of future AVINZA royalties that Ligand
will receive, tax shieldedby our remaining net operating losses (NOLs),
comprises a significant percentage of the total consideration paid to Ligand in
this deal. Further, the contractsales arrangement with King will allow a smooth
transition from the completion of our co-promotion arrangement with Organon this
quarter until the asset purchase transaction is completed."

The AVINZA asset purchase and contract sales agreements have been approved by
the Board of Directors of each company. The asset purchase agreement is subject
to approval by the stockholders of Ligand, at a special meeting which is
anticipated before year end. The transaction is also subject to
Hart-Scott-Rodino clearance.

Under the terms of this agreement, King has agreed to minimum monthly product
details through 2009 and has agreed to hire Ligand's specialty pain sales
representatives. Post closing, King is expected to promote AVINZA with one of
its two Primary Care sales forces and an enlarged Neuroscience Specialty sales
force. King has also agreed to use commercially reasonable efforts to explore
alternate formulations of AVINZA with Elan for which Ligand would be entitled to
the same royalty stream.

The contract sales agreement requires King to provide a minimum number of
product details per month until the closing. In conjunction with Ligand's
specialty sales force, King will support AVINZA with both its Primary Care and
Neuroscience Specialty sales representatives. Ligand will pay King a customary
fee for each product detail and certain marketing and promotional expenses as
agreed between the parties.

Blissenbach concluded, "The sale of AVINZA is a significant positive event for
Ligand shareholders, and an important first step in our program to create value
for Ligand stockholders. We are evaluating a distribution of a majority of the
cash proceeds from


this and any future asset sales (which are expected to be shielded by our
remaining tax loss carry forwards) to shareholders in the form of a special
dividend. By the end of the year, Ligand expects to have restructured and
focused its research and development endeavors. The Board ofDirectors expects to
have new corporate leadership, a promising stable of molecules in various phases
of development, future royalty streams, and a goal to be both earnings and
cash-flow positive. "

ABOUT AVINZA
AVINZA (oral morphine sulfate extended-release capsules) is the first true
once-a-day treatment for chronic to moderate-to-severe pain in patients who
require continuous, around-the-clock opioid therapy for an extended period of
time. Approved by the FDA in March 2002, AVINZA consists of two components: an
immediate-release component that rapidly achieves plateau morphine
concentrations in plasma and an extended-release component that maintains plasma
concentrations throughout a 24-hour dosing interval. According to Frost and
Sullivan opioid sales are expected to exceed $7 billion in 2009.


ABOUT LIGAND
Ligand discovers, develops and markets new drugs that address critical unmet
medical needs of patients in the areas of cancer, pain, skin diseases, men's and
women's hormone-related diseases, osteoporosis, metabolic disorders, and
cardiovascular and inflammatory diseases. Ligand's proprietary drug discovery
and development programs are based on its leadership position in gene
transcription technology, primarily related to intracellular receptors. For more
information, go to HTTP://WWW.LIGAND.COM.

CAUTION REGARDING FORWARD-LOOKING STATEMENTS
This news release contains forward-looking statements within the meaning of
Section 21E of the Securities Exchange Act of 1934, as amended, that reflect
Ligand's judgment and involve risks and uncertainties as of the date of this
release. The statements include those related to the pending sale of AVINZA to
King. Actual events or results may differ


from Ligand's expectations, judgments and beliefs. For example, there can be no
assurance that the pending sale ofAVINZA to King will close as contemplated. .
         Additional information concerning these or other risk factors affecting
Ligand's business can be found in prior press releases as well as in Ligand's
public periodic filings with the SEC, available via Ligand's web site at
www.ligand.com. Ligand disclaims any intent or obligation to update these
forward-looking statements beyond the date of this release.
         AVINZA is a registered trademark of Ligand Pharmaceuticals
Incorporated. Each other trademark, trade name or service mark appearing in this
news release belongs to its holder.

         CONTACT: Ligand Pharmaceuticals Incorporated
         Paul V. Maier, 858-550-7573

         SOURCE: Ligand Pharmaceuticals Incorporated

                                       ###




                                                                    EXHIBIT 99.2

            LIGAND ANNOUNCES SALE OF ONCOLOGY PRODUCT LINES AS NEXT
                 STEP IN SHAREHOLDER VALUE MAXIMIZATION PROCESS

    AGGREGATE CASH CONSIDERATION TO LIGAND FROM COMMERCIAL PRODUCTS SALES OF
  AVINZA AND ONCOLOGY PRODUCT LINES EXCEEDS $500 MILLION PLUS AVINZA ROYALTIES


         SAN DIEGO, CA SEPTEMBER 7, 2006---Ligand Pharmaceuticals Incorporated
(NASDAQ: LGND) (the "Company" or "Ligand") is pleased to announce today that it
has signed a definitive agreement to sell its oncology product line and the
associated assets to Eisai Co., Ltd. (Tokyo) and Eisai Inc. (New Jersey)
("Eisai"). The sale includes Ligand's four marketed oncology drugs: ONTAK,
Targretin capsules, Targretin gel and Panretin gel.
         "We are pleased that our strategic process has produced another
transaction that we believe will enhance shareholder value. The sale of our
commercial businesses will create a refocused Ligand built upon our targeted
internal research and development effort and broad partnered product pipelines,"
said Henry F. Blissenbach, Ligand Chairman and Interim CEO. "This transaction
brings significant near-term value to Ligand and places the product line with a
strong international company that we are confident will serve our oncology
patients well."
         The asset purchase agreement and related contracts have been approved
by relevant executive committee and/or boards of directors of the companies. The
transaction is, however, subject to Hart-Scott-Rodino clearance, and is expected
to close soon afterwards.
         Under the terms of the asset purchase agreement, Ligand will receive
cash of $205 million. In addition, Eisai will assume all future royalty payment
obligations for the products. Eisai will receive from Ligand all rights to the
products worldwide including the related intellectual property and licenses,
transfer of product inventory, and the assignment of certain agreements,
principally patent licenses and supply and distribution agreements.


                                   CONCLUSION

         Blissenbach stated, "We have now sold our two commercial operations for
aggregate cash consideration of $518 million, and have also retained a
significant royalty participation in AVINZA - which we believe will provide
extraordinary value to Ligand as a result of the excellent sales capabilities of
King Pharmaceuticals. The shareholder value maximization process will remain
ongoing as we continue to identify sources of value for Ligand's shareholders.
With the sale of our commercial operations, Ligand will become a dynamic and
highly-specialized R&D and royalty company. On the royalty front, we are excited
about the future income streams from AVINZA (through November 2017), and are
also optimistic about potential milestones and royalties from GSK's Promacta
(formerly Eltrombopag), Wyeth's Bazedoxifene, and Ligand's several other
clinical-stage partnered products. By the end of 2006, Ligand expects to have
new corporate leadership, to have restructured and narrowly focused its research
and development endeavors in order to focus on our most promising compounds (two
of which we expect will be going into clinical trials before year end), and to
minimize its expense structure with a goal to be both earnings and cash-flow
positive."

                                    CONFERENCE CALL

     Ligand will hold a conference call on Monday September 11th at 11:00AM EDT.
to discuss the sales of its two commercial operations, to outline its vision for
the "new" Ligand, and to answer any questions related to either topic.
Conference dial-in for US and Canada is: 1-877-356-5578, Conference ID is:
6223927. The call will be web cast live and can be accessed on Ligand's web site
at WWW.LIGAND.COM, investor relations page, and WWW.STREETEVENTS.COM.

ABOUT THE ONCOLOGY PRODUCTS
ABOUT ONTAK(R)

         In February 1999, the U.S. Food and Drug Administration granted
Seragen, Inc., a wholly owned subsidiary of Ligand, marketing approval for ONTAK
for the treatment of



patients with persistent or recurrent cutaneous T-cell lymphoma, whose malignant
cells express the p55 (CD25) component of the IL-2 receptor.

ABOUT TARGRETIN(R) & PANRETIN(R)

         Targretin is a selective retinoid X receptor (RXR) modulator with
proven efficacy as monotherapy in the treatment of cutaneous T-cell lymphoma
(CTCL). RXR levels in the tumor have been shown to be an independent predictor
of survival in NSCLC and in other solid tumors.
         In December 1999, the FDA approved Targretin capsules for the treatment
of cutaneous manifestations of cutaneous t-cell lymphoma in patients who are
refractory to at least one prior systemic therapy. The European Commission
granted marketing authorization for Targretin capsules in March 2001, and the
product is currently marketed in many major European countries, including
Germany, the United Kingdom, France, and Italy.
         In February 1999, the FDA granted marketing clearance for Panretin gel
0.1% for the topical treatment of cutaneous lesions of patients with
AIDS-related Kaposi's sarcoma.

ABOUT AVINZA
         AVINZA (oral morphine sulfate extended-release capsules) is the first
true once-a-day treatment for chronic to moderate-to-severe pain in patients who
require continuous, around-the-clock opioid therapy for an extended period of
time. Approved by the FDA in March 2002, AVINZA consists of two components: an
immediate-release component that rapidly achieves plateau morphine
concentrations in plasma and an extended-release component that maintains plasma
concentrations throughout a 24-hour dosing interval. According to Frost and
Sullivan opioid sales are expected to exceed $7 billion in 2009.

ABOUT LIGAND
         Ligand discovers, develops and markets new drugs that address critical
unmet medical needs of patients in the areas of cancer, pain, skin diseases,
men's and women's



hormone-related diseases, osteoporosis, metabolic disorders, and cardiovascular
and inflammatory diseases. Ligand's proprietary drug discovery and development
programs are based on its leadership position in gene transcription technology,
primarily related to intracellular receptors. For more information, go to
HTTP://WWW.LIGAND.COM.

CAUTION REGARDING FORWARD-LOOKING STATEMENTS
         This news release contains forward-looking statements within the
meaning of Section 21E of the Securities Exchange Act of 1934, as amended, that
reflect Ligand's judgment and involve risks and uncertainties as of the date of
this release. The statements include those related to the pending sales of the
Avinza and oncology product lines. Actual events or results may differ from
Ligand's expectations, judgments and beliefs. For example, there can be no
assurance that the pending sales of Avinza and oncology product lines will close
as contemplated.
          Additional information concerning these or other risk factors
affecting Ligand's business can be found in prior press releases as well as in
Ligand's public periodic filings with the SEC, available via Ligand's web site
at www.ligand.com. Ligand disclaims any intent or obligation to update these
forward-looking statements beyond the date of this release.
         AVINZA, ONTAK, Targretin and Panretin are registered trademarks of
Ligand Pharmaceuticals Incorporated. Each other trademark, trade name or service
mark appearing in this news release belongs to its holder.

         CONTACT: Ligand Pharmaceuticals Incorporated
         Paul V. Maier, 858-550-7573

         SOURCE: Ligand Pharmaceuticals Incorporated

                                       ###




________________________________________________________________________________





                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                                 ---------------

                                    FORM 8-K

                                 CURRENT REPORT


     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

       Date of Report (Date of earliest event reported): September 6, 2006

                       LIGAND PHARMACEUTICALS INCORPORATED
             (Exact name of registrant as specified in its charter)

                                    DELAWARE
                 (State or other jurisdiction of incorporation)

                                    000-20720
                            (Commission File Number)

                           10275 SCIENCE CENTER DRIVE,
                              SAN DIEGO, CALIFORNIA
                    (Address of principal executive offices)

                                 (858) 550-7500
              (Registrant's telephone number, including area code)

                                   77-0160744
                      (I.R.S. Employer Identification No.)

                                   92121-1117
                                   (Zip Code)

                            _______________________

Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

|_| Written communications pursuant to Rule 425 under the Securities Act (17 CFR
    230.425)
|x| Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
    240.14a-12)
|_| Pre-commencement communications pursuant to Rule 14d-2(b) under
    the Exchange Act (17 CFR 240.14d-2(b))
|_| Pre-commencement communications pursuant to Rule 13e-4(c) under
    the Exchange Act (17 CFR 240.13e-4(c))

_______________________________________________________________________________]




ITEM 1.01.  ENTRY INTO A MATERIAL DEFINITIVE AGREEMENT.

PURCHASE AGREEMENT

              On September 6, 2006, Ligand Pharmaceuticals Incorporated, a
Delaware corporation (the "COMPANY"), King Pharmaceuticals, Inc., a Tennessee
corporation ("KING PHARMACEUTICALS"), and King Pharmaceuticals Research and
Development, Inc., a Delaware corporation and wholly owned subsidiary of King
Pharmaceuticals ("KING R&D", and together with King Pharmaceuticals, "KING")
entered into a Purchase Agreement (the "PURCHASE AGREEMENT"), pursuant to which
King has agreed to acquire all of the Company's rights in and to Avinza(R)
(morphine sulfate extended-release capsules) in the United States, its
territories and Canada, including, among other things, all Avinza(R) inventory,
equipment, records and related intellectual property, and assume certain
liabilities as set forth in the Purchase Agreement (collectively, the
"TRANSACTION"). In addition, King has, subject to the terms and conditions of
the Purchase Agreement, agreed to offer employment following the closing of the
Transaction (the "CLOSING") to certain of the Company's existing sales
representatives that support the sale of Avinza(R) or otherwise reimburse the
Company for certain agreed upon severance arrangements offered to any such
non-hired representatives.

              Pursuant to the Purchase Agreement, at Closing, the Company will
be paid a $265 million cash payment (the "CLOSING PAYMENT"), $15 million of
which will be funded into an escrow account to support any indemnification
claims made by King following the Closing, and King will assume certain
liabilities, including a product-related liability owed by the Company to
Organon Pharmaceuticals USA Inc. of approximately $48 million. The Closing
Payment is subject to adjustment based on the Company's ability to reduce
wholesale and retail inventory levels of Avinza(R) to certain targeted levels by
Closing in accordance with the Purchase Agreement.

              King has also agreed to pay the Company, in addition to assuming
existing royalty obligations owed to Organon Pharmaceuticals USA Inc. and other
third parties, a 15% royalty on King's annual net sales of Avinza(R) or any
reformulation or derivation thereof for the first 20 months following the later
of the Closing or January 1, 2007, and, thereafter through November 25, 2017, as
follows:

              o   if annual net sales are $200 million or less, 5% of all such
                  net sales;

              o   if annual net sales exceed $200 million but do not exceed
                  $250 million, 10% of all such net sales; and

              o   if annual net sales exceed $250  million,  10% on all net
                  sales up to and including $250 million, plus 15% of net sales
                  in excess of $250 million.

              In connection with the Transaction, King has committed to loan the
Company, at the Company's option, $37.75 million (the "LOAN"). If the Loan is
drawn by the Company, amounts outstanding thereunder would be subject to certain
market terms, including a 9.75% interest rate and a security interest in Company
assets other than those related to Avinza(R). Upon Closing, accrued interest on
the Loan would be forgiven and the outstanding principal amount due thereunder
would be credited against the Closing Payment. If the Loan is drawn by the
Company and the Closing does not occur, accrued interest and the outstanding
principal amount due thereunder would become due on January 1, 2007.

              The Purchase Agreement may be terminated by either King or the
Company if the Closing has not occurred by December 31, 2006, or upon the
occurrence of certain customary matters. In addition, if the Purchase Agreement
is terminated under certain circumstances, including a determination by the
Company's board of directors to accept an acquisition proposal it deems superior
to the Transaction, the Company has agreed to pay King a termination fee of $12
million. The Closing is subject to certain closing conditions, including, but
not limited to, Company stockholder approval of the Transaction, the conversion
or redemption prior to Closing of all outstanding 6% Convertible Subordinated
Notes due 2007 of the Company, the expiration of the waiting period under the
Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, and certain
other customary closing conditions.




CONTRACT SALES FORCE AGREEMENT

              Also on September 6, 2006, the Company entered into a Contract
Sales Force Agreement (the "SALES AGREEMENT") with King, pursuant to which King
has agreed to conduct a detailing program to promote the sale of Avinza(R) for
an agreed upon fee, subject to the terms and conditions of the Sales Agreement.
Pursuant to the Sales Agreement, King has agreed to perform certain minimum
monthly product details, which are to commence no later than October 1, 2006 and
continue for a period of six months following such date or until the Closing or
earlier termination of the Purchase Agreement. The Company estimates that,
assuming the Closing were to occur at the end of December 2006, the amount due
to King under the Contract Sales Force Agreement would be approximately $4
million.

              The foregoing descriptions of the Purchase Agreement and the Sales
Agreement do not purport to be complete and are qualified in their entirety by
reference to such agreements. The Purchase Agreement is filed as Exhibit 2.1
hereto and is incorporated herein by reference.

           IMPORTANT ADDITIONAL INFORMATION WILL BE FILED WITH THE SEC

              The Company and its board of directors intend to file with the
Securities and Exchange Commission and mail to its stockholders a Proxy
Statement in connection with the Transaction. The Proxy Statement will contain
important information about the Company, King, the Transaction and related
matters. Investors and security holders are urged to read the Proxy Statement
carefully when it is available.

              Investors and security holders will be able to obtain copies of
the Proxy Statement and other documents filed with the SEC by the Company and
King free of charge through the web site maintained by the SEC at WWW.SEC.GOV.
In addition, investors and security holders will be able to obtain copies of the
Proxy Statement free of charge from the Company by contacting Ligand
Pharmaceuticals Incorporated, Attn: Investor Relations, 10275 Science Center
Drive, San Diego, California 92121-1117, (858) 550-7500.

              The Company and its directors and executive officers may be deemed
to be participants in the solicitation of proxies in respect of the Transaction.
Information regarding the Company's directors and executive officers is
contained in the Company's Form 10-K for the year ended December 31, 2005 and in
Reports on Form 8-K filed with the SEC from time to time. As of August 31, 2006,
the Company's directors and executive officers beneficially owned approximately
9,695,891 shares, or 11.99%, of the Company's common stock. A more complete
description will be available in the Proxy Statement. Investors and security
holders are urged to read the Proxy Statement and the other relevant materials
(when they become available) before making any voting or investment decision
with respect to the Transaction.



ITEM 9.01.   FINANCIAL STATEMENTS AND EXHIBITS.

(d) Exhibits

EXHIBIT NUMBER       DESCRIPTION
----------------     --------------------

2.1                  Purchase Agreement, by and between Ligand Pharmaceuticals
                     Incorporated, King Pharmaceuticals, Inc. and King
                     Pharmaceuticals Research and Development, Inc., dated as
                     of September 6, 2006*

* Schedules 1.1(b) (Pre-Existing Assigned Contracts), 2.6 (Royalties) and 2.8(b)
(Inventory Value Adjustments) are attached to end of the Purchase Agreement. All
other schedules to the Purchase Agreement are not material and have been omitted
in reliance on Item 601(b)(2) of Regulation S-K. The Company agrees to furnish
supplementally a copy of any omitted schedule to the Securities and Exchange
Commission upon request.





                                   SIGNATURES

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                                  LIGAND PHARMACEUTICALS INCORPORATED




    Date : September 11, 2006     By:   /s/  Warner R. Broaddus
                                        _______________________________________
                                  Name:    Warner R. Broaddus
                                  Title:   Vice President, General Counsel &
                                           Secretary





                                  EXHIBIT INDEX



EXHIBIT NUMBER       DESCRIPTION
-----------------    -------------------

2.1                  Purchase Agreement, by and between Ligand Pharmaceuticals
                     Incorporated, King Pharmaceuticals, Inc. and King
                     Pharmaceuticals Research and Development, Inc., dated as
                     of September 6, 2006*

* Schedules 1.1(b) (Pre-Existing Assigned Contracts), 2.6 (Royalties) and 2.8(b)
(Inventory Value Adjustments) are attached to the end of the Purchase Agreement.
All other schedules to the Purchase Agreement are not material and have been
omitted in reliance on Item 601(b)(2) of Regulation S-K. The Company agrees to
furnish supplementally a copy of any omitted schedule to the Securities and
Exchange Commission upon request.



                                                                     EXHIBIT 2.1






                               PURCHASE AGREEMENT



                                     between



                       LIGAND PHARMACEUTICALS INCORPORATED


                                       and

                           KING PHARMACEUTICALS, INC.

                                       and

               KING PHARMACEUTICALS RESEARCH AND DEVELOPMENT, INC.



                          Dated as of September 6, 2006




                                TABLE OF CONTENTS


ARTICLE I DEFINITIONS..........................................................1

         1.1      DEFINITIONS..................................................1
         1.2      OTHER DEFINITIONAL PROVISIONS...............................14

ARTICLE II PURCHASE AND SALE..................................................14

         2.1      TRANSFER OF PURCHASED ASSETS................................14
         2.2      EXCLUDED ASSETS.............................................14
         2.3      ASSUMED LIABILITIES.........................................15
         2.4      EXCLUDED LIABILITIES........................................16
         2.5      SELLER TO OBTAIN CONSENT OF THIRD PARTIES...................16
         2.6      PURCHASE PRICE..............................................16
         2.7      PURCHASE PRICE ALLOCATION...................................17
         2.8      INVENTORY VALUE ADJUSTMENTS.................................17
         2.9      ESCROW......................................................19
         2.10     RISK OF LOSS................................................20

ARTICLE III CLOSING...........................................................20

         3.1      CLOSING.....................................................20
         3.2      TRANSACTIONS AT CLOSING.....................................20

ARTICLE IV REPRESENTATIONS AND WARRANTIES OF SELLER...........................21

         4.1      ORGANIZATION................................................21
         4.2      DUE AUTHORIZATION...........................................21
         4.3      NO CONFLICTS; ENFORCEABILITY................................22
         4.4      TITLE; ASSETS...............................................22
         4.5      INTELLECTUAL PROPERTY.......................................22
         4.6      LITIGATION..................................................24
         4.7      CONSENTS....................................................24
         4.8      TAXES.......................................................24
         4.9      EMPLOYEE MATTERS............................................25
         4.10     COMPLIANCE WITH LAWS........................................25
         4.11     REGULATORY MATTERS..........................................26
         4.12     GOVERNMENT PRODUCT CONTRACTS; LIABILITY FOR COST
                  AND PRICING DATA............................................26
         4.13     FINANCIAL STATEMENTS........................................27
         4.14     WARRANTIES..................................................27
         4.15     BROKERS, ETC................................................27
         4.16     INVENTORY AND EQUIPMENT.....................................27
         4.17     CONTRACTS...................................................27
         4.18     PRODUCT LIABILITY; DISTRIBUTORS; RECALLS....................28
         4.19     PRODUCT TREATMENTS; PRODUCT RETURNS; EXPORTING
                  AND MANUFACTURING...........................................28
         4.20     CUSTOMERS, SUPPLIERS AND THIRD PARTY SERVICE PROVIDERS......29

                                       i


         4.21     MEDICAL INFORMATION.........................................29
         4.22     DISCLAIMER..................................................29

ARTICLE V REPRESENTATIONS AND WARRANTIES OF PURCHASER.........................30

         5.1      ORGANIZATION................................................30
         5.2      DUE AUTHORIZATION...........................................30
         5.3      NO CONFLICTS; ENFORCEABILITY................................30
         5.4      LITIGATION..................................................30
         5.5      CONSENTS....................................................30
         5.6      FINANCING...................................................31
         5.7      BROKERS, ETC................................................31

ARTICLE VI COVENANTS PRIOR TO CLOSING.........................................31

         6.1      ACCESS TO INFORMATION; REPORTING; CORRESPONDENCE
                  AND NOTICES.................................................31
         6.2      CONDUCT OF THE PRODUCT LINE.................................32
         6.3      INVENTORY...................................................33
         6.4      REQUIRED APPROVALS AND CONSENTS.............................33
         6.5      HSR ACT.....................................................33
         6.6      PROXY STATEMENT; SELLER STOCKHOLDERS' MEETIN................34
         6.7      NO NEGOTIATION..............................................36
         6.8      NOTIFICATIONS...............................................36
         6.9      PRODUCT PACKAGING...........................................36
         6.10     FURTHER ASSURANCES; FURTHER DOCUMENTS.......................37

ARTICLE VII CONDITIONS TO CLOSING.............................................37

         7.1      CONDITIONS PRECEDENT TO OBLIGATIONS OF PURCHASER
                  AND SELLER..................................................37
         7.2      CONDITIONS PRECEDENT TO PURCHASER'S OBLIGATIONS.............38
         7.3      CONDITIONS PRECEDENT TO SELLER'S OBLIGATIONS................38

ARTICLE VIII ADDITIONAL COVENANTS.............................................39

         8.1      CONFIDENTIALITY; PUBLICITY..................................39
         8.2      AVAILABILITY OF RECORDS.....................................39
         8.3      NOTIFICATION OF CUSTOMERS...................................40
         8.4      PRODUCT RETURNS, REBATES AND CHARGEBACKS....................40
         8.5      ACCOUNTS RECEIVABLE.........................................43
         8.6      REGULATORY MATTERS..........................................43
         8.7      WEBSITE INFORMATION.........................................44
         8.8      TAX MATTERS.................................................44
         8.9      GOVERNMENT PRODUCT CONTRACTS................................45
         8.10     INSURANCE...................................................45
         8.11     PRODUCT PROMOTION...........................................45
         8.12     ADVISORY FEES, ETC..........................................46

ARTICLE IX EMPLOYEE MATTERS...................................................46

                                       ii

         9.1      EMPLOYEE OFFERS.............................................46
         9.2      BENEFITS....................................................47
         9.3      WARN ACT....................................................48
         9.4      EMPLOYEE INFORMATION........................................48

ARTICLE X INDEMNIFICATION.....................................................48

         10.1     INDEMNIFICATION BY SELLER...................................48
         10.2     INDEMNIFICATION BY PURCHASER................................48
         10.3     PROCEDURES..................................................49
         10.4     CERTAIN LIMITATIONS ON INDEMNIFICATION OBLIGATIONS..........50
         10.5     SET-OFF.....................................................50
         10.6     SURVIVAL....................................................51

ARTICLE XI TERMINATION AND SURVIVAL...........................................51

         11.1     TERMINATION.................................................51
         11.2     PROCEDURE AND EFFECT OF TERMINATION.........................52

ARTICLE XII MISCELLANEOUS.....................................................53

         12.1     ASSIGNMENT; BINDING EFFECT..................................53
         12.2     EXPENSES....................................................53
         12.3     NOTICES.....................................................54
         12.5     ENTIRE AGREEMENT............................................54
         12.6     NO THIRD PARTY BENEFICIARIES................................55
         12.7     WAIVER......................................................55
         12.8     GOVERNING LAW; JURISDICTION.................................55
         12.9     INJUNCTIVE RELIEF...........................................55
         12.10    HEADINGS................................................... 56
         12.11    COUNTERPARTS................................................56
         12.12    SCHEDULES...................................................56
         12.13    CONSTRUCTION................................................56

                                      iii



                           LIST OF EXHIBITS



Exhibit A       -          Form of Assignment of Product Intellectual Property

Exhibit B       -          Form of Bill of Sale and Assignment and
                           Assumption Agreement

Exhibit C       -          Form of Product License and Supply Agreement
                           Assignment

Exhibit D       -          Form of Second Source Supply Agreement
                           Assignment

Exhibit E       -          Form of Termination and Return of Rights Agreement
                           Assignment

Exhibit F       -          Form of Technical Agreement Avinza(R) Assignment

Exhibit G       -          Form of Quality Agreement for Avinza(R) Assignment

Exhibit H       -          Form of Transition Services Agreement

Exhibit I       -          Form of Contract Sales Force Agreement

Exhibit J       -          Form of Escrow Agreement

Exhibit K       -          Form(s) of Consents to Assignment

Exhibit L       -          Product License and Supply Agreement

Exhibit M       -          Second Source Supply Agreement

Exhibit N       -          Termination and Return of Rights Agreement

Exhibit O       -          Technical Agreement Avinza(R)

Exhibit P       -          Quality Agreement for Avinza(R)


                                       iv




                                LIST OF SCHEDULES

       Schedule 1.1(a)         -       Applicable Permits
       Schedule 1.1(b)         -       Pre-Existing Assigned Contracts
       Schedule 1.1(c)         -       Inventory
       Schedule 1.1(d)         -       Knowledge
       Schedule 1.1(e)         -       Product Domain Names
       Schedule 1.1(f)         -       Product Equipment
       Schedule 1.1(g)         -       Product Marks
       Schedule 1.1(h)         -       Product Trade Dress
       Schedule 1.1(i)         -       Promotional Materials
       Schedule 1.1(j)         -       Registrations
       Schedule 1.1(k)         -       Product Patent Rights
       Schedule 2.3            -       Assumed Liabilities
       Schedule 2.5            -       Assigned Contracts - Third Party Consents
       Schedule 2.6            -       Royalties
       Schedule 2.7            -       Allocation Schedule
       Schedule 2.8(b)         -       Inventory Value Adjustments
       Schedule 3.2(a)(iv)     -       Seller FDA Letter
       Schedule 3.2(b)(iv)     -       Purchaser FDA Letter
       Schedule 6.2            -       Conduct of the Product Line Business
       Schedule 8.4(a)         -       Product Returns
       Schedule 8.4(b)         -       Best Price; AMP
       Schedule 8.4(c)         -       Commercial Rebate Agreements
       Schedule 9.1(a)(1)      -       Product Employees
       Schedule 9.1(a)(2)      -       Severance Pay Policy


                           SELLER DISCLOSURE SCHEDULE

        Schedule 4.3           -       No Conflicts
        Schedule 4.4           -       Title; Assets
        Schedule 4.5           -       Intellectual Property
        Schedule 4.6           -       Litigation
        Schedule 4.7           -       Consents
        Schedule 4.8           -       Taxes
        Schedule 4.9           -       Plans and Material Documents
        Schedule 4.9(g)        -       Product Employee Actions
        Schedule 4.10          -       Compliance with Laws
        Schedule 4.11          -       Regulatory Matters
        Schedule 4.14          -       Warranties
        Schedule 4.17(a)       -       Product Line Business Contracts
        Schedule 4.17(b)       -       Contract Deficiencies
        Schedule 4.18          -       Product Liability; Distributors; Recalls
        Schedule 4.19          -       Product Treatments; Product Returns;
                                       Exporting and Manufacturing

                                       v

                               PURCHASE AGREEMENT

         THIS PURCHASE AGREEMENT (this "AGREEMENT"), dated as of September 6,
2006 (the "EXECUTION DATE"), is entered into by and between Ligand
Pharmaceuticals Incorporated, a Delaware corporation, and all of its successors
and assigns ("SELLER"), King Pharmaceuticals, Inc., a Tennessee corporation
("KING"), and King Pharmaceuticals Research and Development, Inc., a Delaware
corporation and wholly owned subsidiary of King ("KING R&D", and together with
King, "PURCHASER"). Each of Seller and Purchaser is sometimes referred to
herein, individually, as a "PARTY" and, collectively, as the "PARTIES." All
capitalized terms used herein shall have the meanings specified in ARTICLE I
below or elsewhere in this Agreement, as applicable.

                                  INTRODUCTION

         WHEREAS, subject to the terms and conditions of this Agreement, Seller
desires to transfer all of its rights in and to the Purchased Assets, including
without limitation all of Seller's rights related to the Distribution (as such
capitalized terms are defined below) of the Product in the Territory,
(collectively, the "PRODUCT LINE BUSINESS") to Purchaser; and

         WHEREAS, subject to the terms and conditions of this Agreement, Seller
wishes to sell the Purchased Assets and transfer the Assumed Liabilities to
Purchaser (as such capitalized terms are defined below), and Purchaser wishes to
purchase the Purchased Assets and assume the Assumed Liabilities from Seller.

         NOW, THEREFORE, in consideration of the foregoing and the
representations, warranties, covenants, agreements and provisions set forth
herein and in the Other Agreements, and for other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, and
intending to be legally bound hereby, the Parties agree as follows:

                                    ARTICLE I
                                   DEFINITIONS

     1.1 DEFINITIONS. In addition to the terms defined above and other terms
defined in other Sections of this Agreement, the following terms shall have the
meanings set forth below for purposes of this Agreement:

         "ACCOUNTANTS" means an accounting firm of national reputation with
pharmaceutical experience (excluding each of Seller's and Purchaser's respective
regular outside accounting firms) as may be mutually acceptable to the Parties;
PROVIDED, HOWEVER, if the Parties are unable to agree on such accounting firm
within ten (10) days or any such mutually selected accounting firm is unwilling
or unable to serve, then Seller shall deliver to Purchaser a list of three (3)
other accounting firms of national reputation, and Purchaser shall select one of
such three (3) accounting firms.

     "ACCOUNTS RECEIVABLE" has the meaning set forth in SECTION 2.2(B).

     "ACQUISITION PROPOSAL" means an unsolicited proposal from a third party
relating to any transaction involving, in whole or in part, directly or
indirectly, the Product or Product Line

                                       1



Business, including an acquisition of more than 25% of the common stock, par
value, $.001, of Seller.

     "ACT" means the United States Federal Food, Drug, and Cosmetic Act, as
amended, and regulations promulgated thereunder.

     "ACTION" means any claim, action, suit, arbitration, complaint, inquiry,
audit, proceeding or investigation, in each case by or before any Governmental
Authority.

     "AFFILIATE" means, with respect to any Person, any other Person directly or
indirectly controlling or controlled by, or under direct or indirect common
control with, such Person. For purposes of this definition, a Person shall be
deemed, in any event, to control another Person if it owns or controls, directly
or indirectly, more than fifty percent (50%) of the voting equity of the other
Person.

     "AGREEMENT" has the meaning set forth in the Preamble of this Agreement.

     "ALLOCATION SCHEDULE" has the meaning set forth in SECTION 2.7(A).

     "AMP" has the meaning set forth in SECTION 8.4(B)(I).

     "APPLICABLE PERMITS" means, to the extent transferable under applicable
Law, the permits, approvals, licenses, franchises or authorizations, including
the Registrations, from any Governmental Authority held by Seller that relate
primarily or exclusively to the Product or the Product Line Business set forth
on SCHEDULE 1.1(A)(I) hereto.

     "ASSETS" of any Person means all assets and properties of any kind, nature,
character and description (whether real, personal or mixed, whether tangible or
intangible, whether absolute, accrued, contingent, fixed or otherwise and
wherever situated), including the goodwill related thereto, operated, owned or
leased by such Person, including cash, cash equivalents, accounts and notes
receivable, chattel paper, documents, instruments, general intangibles,
equipment, inventory, goods and intellectual property.

     "ASSIGNED CONTRACTS" means the Pre-Existing Assigned Contracts and the
Permitted Contract(s), and excluding for all purposes, the Commercial Rebate
Agreements.

     "ASSIGNMENT OF PRODUCT INTELLECTUAL PROPERTY" means the Assignment of
Product Intellectual Property, in the form which shall be mutually agreed by the
Parties and then attached hereto as EXHIBIT A.

     "ASSUMED LIABILITIES" has the meaning set forth in SECTION 2.3.

     "BASKET AMOUNT" has the meaning set forth in SECTION 10.4.

     "BEST PRICE" has the meaning set forth in SECTION 8.4(B)(V).

                                       2


     "BILL OF SALE AND ASSIGNMENT AND ASSUMPTION AGREEMENT" means the Bill
of Sale and Assignment and Assumption Agreement, in the form which shall be
mutually agreed by the Parties and then attached hereto as EXHIBIT B.

     "BUSINESS DAY" means any day other than a Saturday, a Sunday or a day
on which banks in New York, New York, United States of America are authorized or
obligated by Law to be closed.

     "CARDINAL" means Cardinal Health PTS, LLC.

     "CLOSING" means the closing of the purchase and sale of the Purchased
Assets, and assignment and assumption of the Assumed Liabilities contemplated by
this Agreement.

      "CLOSING DATE" has the meaning set forth in SECTION 3.1.

      "CODE" means the United States Internal Revenue Code of 1986, as
amended.

      "COMMERCIAL REBATE AGREEMENTS" has the meaning set forth in SECTION
8.4(C).

      "CONFIDENTIALITY AGREEMENT" means (a) that certain Confidentiality
Agreement, dated as of December 28, 2005, between Seller and King, as amended by
that certain letter agreement, dated as of May 11, 2006, by and between Seller
and King, and (b) that certain Confidentiality Agreement, dated as of August 15,
2006, between Seller and King.

      "CONSENTS TO THE ASSIGNMENTS" shall mean the written consent of each of
the third parties identified on SCHEDULE 2.5 to the assignment of the Contracts
set forth on such schedule, in each case in the applicable form(s) which shall
be mutually agreed by the Parties and then attached hereto as EXHIBIT K.

      "CONTRACTS" means any and all binding written commitments, contracts,
purchase orders, leases, licenses, easements, permits, instruments, commitments,
arrangements, undertakings, practices or other agreements.

      "CONTROL" or "CONTROLLED BY" means, with respect to Intellectual
Property, the ability of a Party (collectively with its Affiliate(s)), whether
by ownership, license or otherwise, to grant a license or sublicense.

      "CONVERTIBLE NOTES" means all outstanding 6% Convertible Subordinated
Notes due 2007, the outstanding aggregate principal amount of which, as of June
30, 2006, was $128,150,000.

      "DISTRIBUTION" means activities related to the distribution, marketing,
promoting, offering for sale and selling of the Product, including advertising,
detailing, educating, planning, promoting, conducting reporting, packaging,
storing, handling, shipping and communicating with Governmental Authorities and
third parties in connection therewith.

      "EFFECTIVE TIME" has the meaning set forth in SECTION 3.1.

                                       3


      "ELAN" means Elan Corporation, plc.

      "ENCUMBRANCE" means any lien (statutory or otherwise), claim, charge,
option, security interest, pledge, mortgage, restriction, financing statement or
similar encumbrance of any kind or nature whatsoever (including any conditional
sale or other title retention agreement and any lease having substantially the
same effect as any of the foregoing and any assignment or deposit arrangement in
the nature of a security device).

      "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended or any successor law, and regulations and rules issued pursuant to that
Act or any successor law.

      "ERISA AFFILIATE" of any entity means any other entity (whether or not
incorporated) that, together with such entity, would be treated as a single
employer under Section 414 of the Code or Section 4001 of ERISA.

      "ESCROW ACCOUNT" has the meaning set forth in SECTION 2.9.

      "ESCROW AGENT" means Wells Fargo Bank, National Association, or such
other party as may be mutually agreed by the Parties.

      "ESCROW AGREEMENT" means the escrow agreement to be entered into at the
Effective Time by and among Purchaser, Seller and the Escrow Agent,
substantially in the form attached hereto as EXHIBIT J, pursuant to which the
Escrow Amount and the Retail Escrow Amount shall be held and disbursed.

      "ESCROW AMOUNT" has the meaning set forth in SECTION 2.9.

      "EXCESS WHOLESALE INVENTORY VALUE" has the meaning set forth in
SCHEDULE 2.8(B).

      "EXCHANGE" means the Nasdaq Global Market.

      "EXCHANGE ACT" means the Securities Exchange Act of 1934, as amended,
and the rules and regulations promulgated thereunder.

      "EXCLUDED ASSETS" means all of Seller's Assets, whether or not relating
to the Product or the Product Line Business, other than the Purchased Assets.

      "EXCLUDED INTELLECTUAL PROPERTY" means all rights, title and interest
of Seller in and to Intellectual Property, whether now existing or hereafter
developed or acquired (including the Seller Brands), other than the Product
Intellectual Property.

      "EXCLUDED LIABILITIES" has the meaning set forth in SECTION 2.4.

      "EXECUTION DATE" means the date set forth in the Preamble of this
Agreement.

      "FDA" means the United States Food and Drug Administration, or any
successor agency thereto.

      "FINAL ALLOCATION" has the meaning set forth in SECTION 2.7(B).

                                       4


      "FSS" has the meaning set forth in SECTION 8.4(B)(IV).

      "GAAP" means United States generally accepted accounting principles.

      "GOVERNMENTAL AUTHORITY" means any nation or government, any
provincial, state, regional, local or other political subdivision thereof, any
supranational organization of sovereign states, and any entity, department,
commission, bureau, agency, authority, board, court, official or officer,
domestic or foreign, exercising executive, judicial, regulatory or
administrative functions of or pertaining to government.

     "GOVERNMENT PRODUCT CONTRACTS" means all Contracts to which Seller is a
party and pursuant to which Seller sells the Product to a Governmental Authority
either singly or together with other pharmaceutical products of Seller.

      "GOVERNMENT REBATES" has the meaning set forth in SECTION 8.4(B)(I).

      "HIRED EMPLOYEES" has the meaning set forth in SECTION 9.1(A).

      "HSR ACT" means the U.S. Hart-Scott-Rodino Antitrust Improvements Act
of 1976, as amended, and the rules and regulations promulgated thereunder.

      "ICS" means Integrated Commercialization Solutions, Inc.

      "ICS AGREEMENT" means the Commercial Outsourcing Services Agreement
entered into March 1, 2002 by and between ICS and Seller, as amended by:
Amendment No. 1 to Ligand Service Agreement dated September 4, 2003, Amendment
No. 2 to Ligand Service Agreement dated September 28, 2004, Amendment to
Commercial Outsourcing Services Agreement dated July 22, 2004, Fourth Amendment
to Commercial Outsourcing Services Agreement dated January 24, 2005, and Fifth
Amendment to Commercial Outsourcing Services Agreement dated April 29, 2005.

      "IND" means Investigational New Drug Application No. 61,328.

      "INTELLECTUAL PROPERTY" means intellectual property rights, including
Trademarks, copyrights and Patents, whether registered or unregistered, and all
applications and registrations therefor, domain names, web sites, know-how,
confidential information, trade secrets, and similar proprietary rights in
inventions, discoveries, analytic models, improvements, products, systems,
processes, techniques, devices, methods, patterns, formulations and
specifications.

      "INVENTORY" means all inventories of the finished Product (and all
rights thereto) and active pharmaceutical ingredient of the Product as described
on SCHEDULE 1.1(C) hereto, which schedule shall describe the Inventory
quantities by SKU and shall be updated at Closing.

      "IRS" means the Internal Revenue Service of the United States.

      "KING PURCHASED ASSETS" means, collectively, all right, title and
interest of Seller in and to the Assigned Contracts, Inventory, Promotional
Materials, Product Equipment, Product
                                        5



Records, and all claims, counterclaims, credits, causes of action, CHOSES IN
ACTION, rights of recovery and rights of setoff relating to any of the
foregoing.

      "KING R&D PURCHASED ASSETS" means, collectively, all right, title and
interest of Seller in and to the Product and Product Line Business other than
the King Purchased Assets and the Excluded Assets, including without limitation,
the Registrations, Applicable Permits, all regulatory files (including
correspondence with regulatory authorities) relating to the Applicable Permits
(provided that Seller may maintain a copy of such files for purposes of
fulfilling its ongoing obligations relating to the Product), any intangible
rights in and to the Product Records, the Product Intellectual Property, and all
claims, counterclaims, credits, causes of action, CHOSES IN ACTION, rights of
recovery and rights of setoff relating to any of the foregoing.

      "KNOWLEDGE" means, with respect to Seller, the actual knowledge of the
Persons set forth on SCHEDULE 1.1(D) hereto.

      "LAW" means each provision of any currently existing federal,
provincial, state, local or foreign law, statute, ordinance, order, code, rule
or regulation, promulgated or issued by any Governmental Authority, as well as
any judgments, decrees, injunctions or agreements issued or entered into by any
Governmental Authority specifically with respect to Seller or the Product.

      "LIABILITY" means, collectively, any indebtedness, guaranty,
endorsement, claim, loss, damage, deficiency, cost, expense, obligation or
responsibility, fixed or unfixed, known or unknown, choate or inchoate,
liquidated or unliquidated, secured or unsecured, direct or indirect, matured or
unmatured, or absolute, contingent or otherwise, including any product
liability.

      "LOI" means, if executed by the Parties, a letter of intent regarding
the Transactions.

      "LOSSES" means, with respect to any claim or matter, all losses,
expenses, obligations and other Liabilities or other damages (whether absolute,
accrued, contingent, fixed or otherwise, or whether known or unknown, or due or
to become due or otherwise), diminution in value, monetary damages, fines, fees,
penalties, interest obligations, deficiencies, losses and expenses (including
amounts paid in settlement, interest, court costs, costs of investigators, fees
and expenses of attorneys, accountants, financial advisors and other experts,
and other expenses of litigation).

      "MALLINCKRODT" means Mallinckrodt, Inc.

      "MALLINCKRODT AGREEMENT" means the letter agreement between Mallinckrodt
and Seller dated May 26, 2005.

      "MATERIAL ADVERSE EFFECT" means any change or effect that is materially
adverse to the Product Line Business taken as a whole, but shall exclude any
change, effect or circumstance resulting or arising from: (a) events,
circumstances, changes or effects that generally affect the industries in which
Seller operates, (b) general economic or political conditions or events,
circumstances, changes or effects affecting the securities markets generally,
and (c) any circumstance, change or effect that results from any action taken at
the request of Purchaser (other than as Seller is required to perform under this
Agreement).

                                       6



      "NDA(S)" means the new drug application covering the Product (NDA No.
21-260), including any supplements, amendments or modifications thereto, or
divisions thereof, including all correspondence under NDA No. 21-260 between the
FDA and Seller, in each case submitted to or required by the FDA prior to the
Effective Time.

     "NDC" means the "National Drug Code", which is the eleven digit code
registered by a company with the FDA with respect to a pharmaceutical product.

     "NET SALES" has the meaning set forth in SCHEDULE 2.6.

     "NON-FAMP" has the meaning set forth in 38 U.S.C. ss. 8126 (h)(5).

     "NOTICE OF OBJECTION" has the meaning set forth in SECTION 2.8(D).

     "ORGANON" means Organon Pharmaceuticals USA Inc.

     "OTHER AGREEMENTS" means, collectively, the Assignment of Product
Intellectual Property, the Bill of Sale and Assignment and Assumption Agreement,
the Product License and Supply Agreement Assignment, the Second Source Supply
Agreement Assignment, the Termination and Return of Rights Agreement Assignment,
the Technical Agreement Avinza(R) Assignment, the Quality Agreement for
Avinza(R) Assignment, the Transition Services Agreement and the Escrow
Agreement.

     "OUTSIDE DATE" has the meaning set forth in SECTION 11.1(A)(II).

     "PARTY" or "PARTIES" has the meaning set forth in the Preamble of this
Agreement.

     "PATENTS" means United States and non-United States patents, patent
applications, patent disclosures, invention disclosures and other rights
relating to the protection of inventions worldwide, and any and all right, title
and interest related to any of the foregoing, including without limitation all
reissues, reexaminations, divisions, continuations, continuations-in-part,
extensions or renewals of any of the foregoing as well as supplementary
protection certificates for medicinal products provided under Council Regulation
(EEC) No. 1768/92 of June 18, 1992, and their equivalents.

     "PDE" shall mean a primary detail equivalent and be defined as equivalent
to any of the following: (a) one P1 Detail; (b) two P2 Details; or (c) five P3
Details. Product Calls other than P1 Details, P2 Details and P3 Details shall
have no effect on any calculation of PDEs. A "P1 DETAIL" is a Product Call where
the Product is presented in the first position. A "P2 DETAIL" is a Product Call
where the Product is presented in the second position. A "P3 DETAIL" is a
Product Call where the Product is presented in the third position.

     "PDM ACT" means the Prescription Drug Marketing Act of 1987, as amended.

     "PERMITTED CONTRACT(S)" means any Contracts, including purchase orders,
which relate to the Product or the Product Line Business and which are entered
into by Seller after the Execution Date, which Contracts involve payment by
Seller of no more than $25,000 or extend for a term no longer than ninety (90)
days from the Closing Date, and which are not otherwise material.

                                       7



     "PERMITTED ENCUMBRANCES" means (a) statutory liens for current Taxes of
Seller not yet due and payable or (b) mechanics', carriers', workers',
repairers' and other similar liens arising or incurred in the ordinary course of
business relating to obligations as to which there is no default on the part of
Seller.

     "PERSON" means any individual, corporation, partnership, joint venture,
limited liability company, trust or unincorporated organization or Governmental
Authority.

     "PLAN" means any employment, bonus, deferred compensation, incentive
compensation, stock ownership, stock purchase, stock appreciation, restricted
stock, stock option, "phantom" stock, performance, stock bonus, paid time off,
perquisite, fringe benefit, vacation, deferred compensation, retiree medical or
life insurance, supplemental retirement, severance or other benefit plans,
programs or arrangements, and all employment, termination, severance, retention
or other contracts or agreements, or other program, policy or arrangement.

     "PRE-EXISTING ASSIGNED CONTRACTS" means those Contracts, including purchase
orders, related primarily or exclusively to the Product and the Product Line
Business which are identified on SCHEDULE 1.1(B) hereto; provided that with
respect to each of Seller's contracts with ICS or Stericycle (formerly Universal
Solutions International Inc.), in the event Purchaser shall have entered into
its own contracts with such parties regarding Purchaser's conduct of the Product
Line Business prior to Closing, then such Seller's contracts with ICS or
Stericycle (formerly Universal Solutions International Inc.) shall not be
included as PRE-EXISTING ASSIGNED CONTRACTS AND SHALL NOT BE ASSIGNED TO OR
ASSUMED BY PURCHASER AS PART OF THE TRANSACTIONS.

     "PRESCRIBERS" shall mean healthcare institutions, hospitals, outpatient
surgery centers and clinics, as well as individual office-based primary care
physicians (i.e., internists, family practitioners and general practitioners),
other specialists, health care professionals or para-professionals legally
authorized to write prescriptions for pharmaceutical products located in the
Territory pursuant to applicable Law.

     "PRODUCT" means, the 30 mg, 60 mg, 90 mg and 120 mg finished dosage
strengths of the once-daily oral dosage microparticulate formulation developed
by Elan containing the active drug substance morphine and its salts as its
primary active ingredient currently marketed by Seller as Avinza(R), and such
other dosage strengths thereof, any reformulations or derivations of the same
(whether or not utilizing the Product Patent Rights) and any other product sold
or distributed under the Product Marks.

     "PRODUCT CALL" shall mean an in person, face-to-face contact by a sales
Representative with a Prescriber in the Territory during which time the
promotional message involving the Product is presented in the first, second or
third position.

     "PRODUCT COPYRIGHTS" means any and all copyrights owned, licensed,
Controlled or otherwise utilized by Seller primarily or exclusively related to
the Product Line Business, Product Trade Dress, Product Mark(s), and/or
Promotional Materials.

     "PRODUCT DOMAIN NAMES" means the domain names and web sites (including
source code and layout) owned, licensed, Controlled or otherwise utilized by
Seller which primarily or exclusively utilize the Product Mark(s) as identified
on SCHEDULE 1.1(E) hereto.

                                       8



     "PRODUCT EMPLOYEE" means those employees set forth on SCHEDULE 9.1(A)(1)
hereto.

     "PRODUCT EQUIPMENT" means the manufacturing tools and test equipment owned
by Seller and used primarily or exclusively to manufacture the Product
identified on SCHEDULE 1.1(F) hereto.

     "PRODUCT INTELLECTUAL PROPERTY" means the Product Patent Rights, Product
Copyrights, Product Know-How, Product Marks, and Product Trade Dress, in each
case relating to the Territory, and the Product Domain Names worldwide.

     "PRODUCT INVENTORY DATA" has the meaning set forth in SECTION 6.1.

     "PRODUCT KNOW-HOW" means as owned, licensed or Controlled by Seller and
primarily or exclusively related to the Product Line Business or Product, the
research and development information, validation methods and procedures,
unpatented inventions, know-how, trade secrets, technical or other data or
information, or other materials, methods, systems, procedures, processes,
materials, developments or technology, including all biological, chemical,
clinical, manufacturing and other information or data, other than such know-how
which is or becomes the subject of a Patent.

     "PRODUCT LICENSE AND SUPPLY AGREEMENT" means the Amended and Restated
License and Supply Agreement, dated as of November 12, 2002, by and between
Seller, Elan and Elan Management Limited, as amended and supplemented from time
to time prior to the Closing Date, which is attached hereto as EXHIBIT L.

     "PRODUCT LICENSE AND SUPPLY AGREEMENT ASSIGNMENT" means the Assignment and
Assumption of Contract with respect to the Product License and Supply Agreement,
in the form which shall be mutually agreed by the Parties and then attached
hereto as EXHIBIT C.

     "PRODUCT LINE BUSINESS" has the meaning set forth in the first Recital to
this Agreement.

     "PRODUCT MARK(S)" means the Trademark "Avinza(R)" and/or such other
Trademark(s) as registered with the PTO or other equivalent Governmental
Authority, which are owned, licensed, Controlled or otherwise utilized by Seller
and/or its Affiliates in the Territory to identify the Product in the Territory
which are identified on SCHEDULE 1.1(G) hereto, including without limitation,
any and all right, title and interest of Seller in and to such Trademarks
outside the Territory (if and to the extent Seller has any such rights, title or
interests).

     "PRODUCT PATENT RIGHTS" means the Patents licensed by Seller pursuant to
the Product License and Supply Agreement, which are identified on SCHEDULE
1.1(K) hereto.

     "PRODUCT RECORDS" means, in whatever medium (e.g., audio, visual, print or
electronic) relating to the Product or the Product Line Business: (a) any and
all data and correspondence supporting and/or utilized or made in connection
with obtaining and/or maintaining any of the Registrations and/or the drug
master file for the Product, (b) raw and/or analysis data for pivotal trials and
integrated summaries (ISE/ISS) and all bio-analytical data in SAS transport, PC
SAS Version 6.06, or above, or other agreed format, (c) all clinical data (phase
I - IV), (d) all data from ongoing development of the compound utilized in the
Product (including marketing

                                       9


studies), (e) programs (analysis, reports and supporting documentation)
for trials for which data is provided, (f) copies of SAS libraries (with
non-exclusive rights to use same) from Seller's analysis programs relating to
the Product, and (g) all books and records owned by Seller relating to the
Product (which shall be copies to the extent not exclusive to the Product),
including copies of all customer and supplier lists, account lists, call data,
sales history, call notes, research data, marketing studies, consultant reports,
physician databases, and correspondence (including invoices) with respect to the
Product, and all complaint files and adverse event reports and files, and (h)
copies of all data and information in the possession of Seller relating to the
activities of Organon and/or IHS or other entity providing support services to
Seller which relate to the Product, including for commercial rebates, discounts,
administrative fees, chargebacks and/or Government Rebates; PROVIDED, HOWEVER,
that (i) in each case, Seller may exclude any Excluded Intellectual Property
contained therein, (ii) Seller may retain: (A) a copy of any such books and
records to the extent necessary for Tax, accounting, litigation or other valid
business purposes other than the conduct of any business competitive with the
Product or the Product Line Business, (B) a copy of all such books and records
which relate to the Excluded Assets, and (C) all books, documents, records and
files (1) prepared in connection with the Transactions, including bids received
from other parties and strategic, financial or Tax analyses relating to the
divestiture of the Purchased Assets, the Assumed Liabilities, the Product and
the Product Line Business, or (2) maintained by Seller and/or its
Representatives, agents or licensees in connection with their respective Tax,
legal, regulatory or reporting requirements other than those relating to the
Product or the Product Line Business, (iii) any attorney work product,
attorney-client communications and other items protected by privilege shall be
excluded except to the extent relating to the Product or the Product Line
Business, and (iv) Seller shall be entitled to redact from any such books and
records any information that does not relate to the Product or Product Line
Business.

     "PRODUCT TRADE DRESS" means the trade dress, package designs, product
inserts, labels, logos and associated artwork owned by, licensed to or otherwise
held by Seller and used primarily or exclusively in connection with the Product,
Product Line Business or the packaging therefor, including without limitation
that which is identified on SCHEDULE 1.1(H) hereto, but specifically excluding
all Seller Brands used thereon other than the Product Marks.

     "PROMOTIONAL MATERIALS" means the advertising, promotional and media
materials, sales training materials (including any related outlines and
quizzes/answers, if any), trade show materials (including displays) and videos,
including materials containing post-marketing clinical data, if any, used
primarily or exclusively for the commercialization of the Product in the
Territory by Seller (including Distribution and sales promotion information,
market research studies and toll-free telephone numbers) identified on SCHEDULE
1.1(I) hereto.

     "PROXY STATEMENT" has the meaning set forth in SECTION 6.6(A).

     "PTO" means the United States Patent and Trademark Office.

     "PURCHASE PRICE" has the meaning set forth in SECTION 2.6.

                                       10



     "PURCHASE PRICE BANK ACCOUNT" means a bank account in the United States to
be designated by Seller in a written notice to Purchaser at least three (3)
Business Days before the Closing.

     "PURCHASED ASSETS" means, together, the King Purchased Assets and the King
R&D Purchased Assets.

     "PURCHASER" has the meaning set forth in the Preamble of this Agreement.

     "QUALITY AGREEMENT FOR AVINZA(R)" means the Quality Agreement for Avinza(R)
dated April 10, 2006, by and between Seller and Cardinal, as amended and
supplemented from time to time prior to the Closing Date, which is attached
hereto as EXHIBIT P.

     "QUALITY AGREEMENT FOR AVINZA(R) ASSIGNMENT" means the Assignment and
Assumption of Contract with respect to the Quality Agreement for Avinza(R), in
the form which shall be mutually agreed by the Parties and then attached hereto
as EXHIBIT G.

     "REBATE TAIL PERIOD" has the meaning set forth in SECTION 8.4(B)(I).

     "REGISTRATIONS" means the regulatory approvals, authorizations, licenses,
applications, rights of reference, permits, INDs, NDAs and other permissions
held by Seller relating primarily or exclusively to the Product in the Territory
and/or Product Line Business issued by Governmental Authorities in the Territory
to Seller as set forth on SCHEDULE 1.1(J) hereto.

     "REPRESENTATIVES" means, with respect to any Person, the directors,
managers, employees, independent contractors, agents or consultants of such
Person.

     "REQUIRED SELLER STOCKHOLDERS" means the approval of the holders of a
majority of the outstanding shares of Seller's common stock.

     "RETAIL ESCROW ACCOUNT" has the meaning set forth in SECTION 2.8(C)(II).

     "RETAIL ESCROW AMOUNT" has the meaning set forth in SECTION 2.8(C)(II).

     "RETAIL INVENTORY VALUE DIFFERENCE" has the meaning set forth in SCHEDULE
2.8(B).

     "RETAIL INVENTORY VALUE STATEMENT" has the meaning set forth in SECTION
2.8(D).

     "RETAIL TARGET" has the meaning set forth in SCHEDULE 2.8(B).

     "ROYALTIES" has the meaning set forth in SCHEDULE 2.6.

     "ROYALTY TERM" means that period of time (a) beginning on later of January
1, 2007 and the Closing Date, and (b) ending on November 25, 2017.

     "SEC" means the United States Securities and Exchange Commission.

                                       11


     "SECOND SOURCE SUPPLY AGREEMENT" means that certain Manufacturing and
Packaging Agreement, dated as of February 13, 2004, between Seller and Cardinal,
as amended and supplemented from time to time prior to the Closing Date, which
is attached hereto as EXHIBIT M.

     "SECOND SOURCE SUPPLY AGREEMENT ASSIGNMENT" means the Assignment and
Assumption of Contract with respect to the Second Source Supply Agreement, in
the form which shall be mutually agreed by the Parties and then attached hereto
as EXHIBIT D. "SECURITIES ACT" means the United States Securities Act of 1933,
as amended, and the rules and regulations promulgated thereunder.

     "SELLER" has the meaning set forth in the Preamble of this Agreement.

     "SELLER BRANDS" means all Trademarks, housemarks, tradenames, and trade
dress owned, licensed, Controlled or used by Seller, whether or not registered,
including the name "Ligand", other than the Product Marks.

     "SELLER DISCLOSURE SCHEDULE" means the disclosure schedules delivered by
Seller to Purchaser in connection with this Agreement (it being expressly agreed
that disclosure of any item or matter under any Section or subsection in such
Seller Disclosure Schedule, or in attachments thereto, and documents referred to
therein, shall be deemed disclosure for all purposes of ARTICLE IV).

     "SELLER PLAN" means all Plans under which any current or former Product
Employee has accrued any benefit or right whatsoever maintained by, contributed
to or required to be contributed to by Seller or any of its ERISA Affiliates or
as to which Seller or any of its ERISA Affiliates has any Liability.

     "SELLER RECOMMENDATION" means the recommendation of the board of directors
of Seller that the board of directors of Seller has determined that the
Transactions are fair to and in the best interests of Seller's stockholders.

     "SELLER STOCKHOLDERS' MEETING" has the meaning set forth in SECTION 6.6(C).

     "SELLER'S SEC FILINGS" means all forms, reports and other documents
required to be filed by Seller under the Securities Act or Exchange Act, as the
case may be since and including January 1, 2004.

     "SKU" means stock keeping unit.

     "SUBSIDIARY" means, with respect to any Person, any and all corporations,
partnerships, limited liability companies, joint ventures, associations and
other entities controlled by such Person.

     "SUPERIOR PROPOSAL" means an Acquisition Proposal, which (a) in the good
faith judgment of the board of directors of Seller (after considering the advice
of its financial advisors and outside legal counsel) would if consummated result
in a transaction that (i) if for the Product, is more favorable to Seller than
the Transactions, or (ii) if for equity interests in Seller or

                                    12


substantially all of the Assets of Seller, including the Product, is
more favorable, taken as a whole, to Seller's stockholders than the
Transactions, and the board of directors of Seller intends to terminate this
Agreement in connection with such determination, or (b) does not require
termination of this Agreement or any of the Other Agreements as a condition to
consummation of such Acquisition Proposal.

     "TAX" or "TAXES" means any and all taxes, assessments, levies, tariffs,
duties or other charges or impositions in the nature of a tax (together with any
and all interest, penalties, additions to tax and additional amounts imposed
with respect thereto) imposed by any Governmental Authority, including income,
estimated income, gross receipts, profits, business, license, occupation,
franchise, capital stock, real or personal property, sales, use, transfer, value
added, employment or unemployment, social security, disability, alternative or
add-on minimum, customs, excise, stamp, environmental, commercial rent or
withholding taxes, and shall include any Liability for Taxes of any other Person
under applicable Law, as a transferee or successor, by contract or otherwise.

     "TAX RETURN" means any report, return (including any information return),
claim for refund, election, estimated Tax filing or payment, request for
extension, document, declaration or other information or filing required to be
supplied to any Governmental Authority with respect to Taxes, including
attachments thereto and amendments thereof.

     "TECHNICAL AGREEMENT AVINZA(R)" means the Technical Agreement Avinza(R)
dated June 10, 2003, by and between Seller and Elan Holdings, Incorporated, as
amended and supplemented from time to time prior to the Closing Date, which is
attached hereto as EXHIBIT O.

     "TECHNICAL AGREEMENT AVINZA(R) ASSIGNMENT" means the Assignment and
Assumption of Contract with respect to the Technical Agreement Avinza(R), in the
form which shall be mutually agreed by the Parties and then attached hereto as
EXHIBIT F.

     "TERMINATION AND RETURN OF RIGHTS AGREEMENT" means the Termination and
Return of Rights Agreement, dated as of January 1, 2006, by and between Seller
and Organon USA Inc., as amended and supplemented from time to time prior to the
Closing Date, which is attached hereto as EXHIBIT N.

     "TERMINATION AND RETURN OF RIGHTS AGREEMENT ASSIGNMENT" means the
Assignment and Assumption of Contract with respect to the Termination and Return
of Rights Agreement, in the form which shall be mutually agreed by the Parties
and then attached hereto as EXHIBIT E.

     "TERMINATION FEE" has the meaning set forth in SECTION 11.2(B).

     "TERRITORY" means the United States of America and its territories and
Canada.

     "TRADEMARK" means trademarks, service marks, certification marks, trade
dress, Internet domain names, trade names, identifying symbols, designs, product
names, company names, slogans, logos or insignia, whether registered or
unregistered, and all common law rights, applications and registrations
therefor, and all goodwill associated therewith.

     "TRANSACTIONS" means the transactions contemplated by this Agreement.

                                       13


     "TRANSFER TAXES" means any and all transfer, documentary, sales, use, gross
receipts, stamp, registration, value added, recording, escrow and other similar
Taxes and fees (including any penalties and interest) incurred in connection
with the Transactions (including recording and escrow fees and any real property
or leasehold interest transfer or gains tax and any similar Tax).

     "TRANSITION SERVICES AGREEMENT" means that certain Transition Services
Agreement, dated as of the date hereof, between Seller and Purchaser, in the
form which shall be mutually agreed by the Parties and then attached hereto as
EXHIBIT H.

     "WHOLESALE TARGET" has the meaning set forth in and calculated pursuant to
SCHEDULE 2.8(B)(I).

     1.2  OTHER DEFINITIONAL PROVISIONS.

          (a) When a reference is made in this Agreement to an Article, Section,
Exhibit or Schedule, such reference is to an Article or Section of, or an
Exhibit or Schedule to, this Agreement unless otherwise indicated.

          (b) The words "hereof," "herein," "hereto" and "hereunder" and words
of similar import, when used in this Agreement, shall refer to this Agreement as
a whole and not to any particular provision of this Agreement.

          (c) The terms defined in the singular has a comparable meaning when
used in the plural, and vice versa.

          (d) Words of one gender include the other gender.

          (e) References to a Person are also to its successors and permitted
assigns. (f) The term "dollars" and "$" means United States dollars.

          (g) The word "including" means "including without limitation" and the
words "include" and "includes" have corresponding meanings.

                                   ARTICLE II
                                PURCHASE AND SALE

     2.1  TRANSFER OF PURCHASED ASSETS. At the Effective Time, on the terms and
subject to the conditions hereof and in consideration of the Purchase Price,
Seller will sell, convey, transfer, assign and deliver to King, and King will
purchase, take delivery of and acquire from Seller, all of Seller's right, title
and interest in and to the King Purchased Assets, and Seller will sell, convey,
transfer, assign and deliver to King R&D, and King R&D will purchase, take
delivery of and acquire from Seller, all of Seller's right, title and interest
in and to the King R&D Purchased Assets.

     2.2  EXCLUDED ASSETS. The Parties acknowledge and agree that Seller is not
selling, conveying, transferring, delivering or assigning any rights whatsoever
to the Excluded Assets to

                                       14



Purchaser, and Purchaser is not purchasing, taking delivery of or acquiring
any rights whatsoever to the Excluded Assets from Seller. Without limiting the
foregoing:

          (a) Purchaser expressly acknowledges it is not acquiring any rights
whatsoever to the Excluded Intellectual Property, including the Seller Brands
thereof and any other logos or Trademarks of Seller not included in the Product
Intellectual Property, and

          (b) Purchaser expressly acknowledges it is not acquiring any rights
whatsoever to any accounts receivable (including any payments received with
respect thereto on or after the Closing, unpaid interest accrued on any such
accounts receivable and any security or collateral related thereto) arising from
sales of the Product on or prior to the Closing Date (collectively, the
"ACCOUNTS RECEIVABLE").

     2.3  ASSUMED LIABILITIES. As of the Effective Time, Purchaser shall
assume and pay, perform or otherwise discharge, in accordance with their
respective terms and subject to the respective conditions thereof, only the
following Liabilities (collectively, the "ASSUMED LIABILITIES"):

          (a) any Liability arising after the Effective Time under any Assigned
Contract; PROVIDED that, for the avoidance of doubt, to the extent Seller has
not made all or any portion of the Forty Seven Million Seven Hundred Fifty
Thousand Dollar ($47,750,000) early termination payment to be made pursuant to
Section 3(c) of the Termination and Return of Rights Agreement prior to the
Effective Time, any and all such unpaid amounts (excluding any penalty amounts,
interest or other amounts due thereon for Seller's failure to pay such amounts
prior to the Effective Time) shall constitute an Assumed Liability;

          (b) any Liability in respect of Hired Employees arising after
Purchaser's employment of Hired Employees, except to the extent that the same
constitute Excluded Liabilities or as otherwise provided in ARTICLE IX to be
retained by Seller; and

          (c) any other Liability, if any, specifically and to the extent set
forth on SCHEDULE 2.3 hereto.

For avoidance of doubt, nothing in this SECTION 2.3 is intended to, or shall be
interpreted to, limit or otherwise reduce the Liabilities of Purchaser as they
may occur and/or exist after the Effective Time solely by virtue of Purchaser's
ownership of the Purchased Assets or operation of the Product Line Business, but
rather, this SECTION 2.3 is solely intended to identify and provide for the
assumption by Purchaser of those Liabilities of Seller that are specifically
assumed by Purchaser hereunder and which, but for such assumption, would remain
Liabilities of Seller.

                                       15


     2.4  EXCLUDED LIABILITIES. Seller shall retain and shall be responsible for
paying, performing and discharging when due, and Purchaser shall not assume or
have any responsibility for (i) any Liability of Seller for Taxes (except as
otherwise provided in SECTION 8.8(A) with respect to Transfer Taxes), (ii) any
penalties or interest resulting from failure to timely pay amounts due under any
Assigned Contracts to the extent relating to any time prior to the Effective
Time, and (iii) any and all Liabilities other than the Assumed Liabilities (the
"EXCLUDED LIABILITIES").

     2.5  SELLER TO OBTAIN CONSENT OF THIRD PARTIES. On the Closing Date, Seller
shall assign to Purchaser, and Purchaser will assume, the Assigned Contracts (to
the extent provided in this Agreement), in each case to the extent permitted by,
and in accordance with, applicable Law. Seller shall, at its sole cost and
expense, use commercially reasonable efforts to obtain the consent of any third
party (in the form which shall be mutually agreed by the Parties and then
attached hereto as EXHIBIT K) required under any Assigned Contract to the
assignment by Seller to Purchaser of the applicable Assigned Contract.
Notwithstanding anything herein to the contrary, if the assignment or assumption
of all or any portion of any rights or obligations under any Assigned Contract
shall require the consent of any other party thereto or any other third party
that has not been obtained prior to the Effective Time, this Agreement shall not
constitute an agreement to assign, license, sublicense, lease, sublease, convey
or otherwise transfer any rights or obligations under any such Assigned
Contract. In order, however, to provide Purchaser the full realization and value
of every Assigned Contract of the character described in the immediately
preceding sentence as soon as practicable after the Effective Time, Seller
shall, at its sole cost and expense, after the Closing, use commercially
reasonable efforts to obtain those consents from any Persons (in the form which
shall be mutually agreed by the Parties and then attached hereto as EXHIBIT K)
not obtained prior to the Effective Time necessary to effectuate the assignment
of any Assigned Contracts. Purchaser shall reasonably cooperate with Seller at
Purchaser's sole cost and expense in connection with such undertaking of Seller
and Seller shall keep Purchaser fully informed in a timely manner as to all
developments regarding the same, including promptly providing Purchaser with
copies of all material correspondence, drafts and other material communications
regarding same.

Notwithstanding the foregoing prior to Closing Purchaser shall use its best
efforts to enter into its own contracts with ICS and Stericycle (formerly
Universal Solutions International Inc.) regarding Purchaser's conduct of the
Product Line Business following Closing.

     2.6  PURCHASE PRICE. In addition to any other amounts due hereunder
(including, without limitation, the Royalties to be paid in accordance with
SCHEDULE 2.6), in consideration of the sale, assignment, conveyance, license and
delivery of the Purchased Assets under ARTICLE II, Purchaser shall, upon the
Closing, assume the Assumed Liabilities and subject to the terms and conditions
hereof pay to Seller, by wire transfer of immediately available funds directly
to an account designated by Seller, the aggregate of the following amounts,
subject to the adjustments set forth in SECTION 2.8 (as adjusted, the "PURCHASE
PRICE"):

          (a) Two Hundred Sixty-Five Million Dollars ($265,000,000); PLUS

          (b) to the extent paid to Organon by Seller prior to Closing,
reimbursement for up to Forty Seven Million Seven Hundred Fifty Thousand Dollars
($47,750,000) in early

                                       16



termination payments made pursuant to Section 3(c) of the Termination and Return
of Rights Agreement.

Payment of the Purchase Price at Closing shall be subject to reduction for any
amounts required to be withheld in escrow pursuant to SECTION 2.8, SECTION 2.9
and any other credits due to Purchaser under the terms of this Agreement.

     2.7  PURCHASE PRICE ALLOCATION.

          (a) Subject to the adjustments described in SECTION 2.8, any payments
or other amounts that are required to be treated as part of the Purchase Price
for federal income tax purposes shall be allocated among the Purchased Assets as
set forth on SCHEDULE 2.7 (the "ALLOCATION SCHEDULE").

          (b) Within fifteen (15) days after the final determination of the
Retail Inventory Value Statement pursuant to SECTION 2.8, Purchaser shall
prepare and deliver to Seller, an amended Allocation Schedule (the "FINAL
ALLOCATION") that reflects the Retail Inventory Value Statement and any
resulting adjustments in the allocation of the payments or other amounts treated
under the Allocation Schedule pursuant to SECTION 2.7(A).

          (c) The Allocation Schedule and Final Allocation shall each be
prepared based on independent third party valuation and in accordance with GAAP.
In accordance with Section 1060 of the Code and the Treasury Regulations
thereunder, Purchaser and Seller agree, unless otherwise required pursuant to a
"determination" within the meaning of Section 1313(a) of the Code, to be bound
by the Final Allocation, to file all Tax Returns (including IRS Form 8594 and
any supplemental or amended IRS Form 8594, each of which IRS Form 8594 shall be
prepared by Purchaser and provided to Seller) in accordance with the Final
Allocation, and not to take any position inconsistent with the Final Allocation
in the course of any audit, examination, other administrative or judicial
proceeding.

     2.8  INVENTORY VALUE ADJUSTMENTS.

          (a) On the Closing Date, Seller shall provide Purchaser with a report
based on Product Inventory Data provided by Seller in accordance with this
Agreement setting forth (i) the calculated amounts for each of the items
enumerated on SCHEDULE 2.8(B) together with all supporting data used to
calculate same, (ii) whether, and the extent to which, the Wholesale Target and
the Retail Target have been met, and (iii) Seller's out-of-pocket cost (without
markup) paid as purchase price to Elan and/or Cardinal between the Execution
Date and the Effective Time for finished Product. The foregoing report shall be
accompanied by a written certification of the CFO of Seller as to the good faith
completeness and accuracy of such report.

          (b) If, at Closing, the Wholesale Target (as adjusted to allow Seller
a credit against the Wholesale Target for Seller's out-of-pocket cost (without
markup) paid as purchase price to Elan and/or Cardinal between the Execution
Date and the Effective Time for the finished Product) has not been achieved, the
Purchase Price shall be adjusted downward by the Excess Wholesale Inventory
Value.

                                       17



          (c) If, at Closing, the Retail Target has not been achieved, then for
each One Dollar ($1.00) of Retail Inventory Value Difference up to and including
Ten Million Dollars ($10,000,000), the Purchase Price shall be adjusted downward
by One Dollar ($1.00), and in addition:

               (i) if Retail Inventory Value Difference is greater than Ten
Million Dollars ($10,000,000), then for each One Dollar ($1.00) of Retail
Inventory Value Difference in excess of Ten Million Dollars ($10,000,000), the
Purchase Price shall be adjusted downward by Fifty Cents ($0.50); or

               (ii) if Retail Inventory Value Difference is less than Ten
Million Dollars ($10,000,000), then the difference between Retail Inventory
Value Difference and Ten Million Dollars ($10,000,000) (the "RETAIL ESCROW
AMOUNT") shall be withheld from Purchase Price paid at Closing and delivered to
the Escrow Agent for deposit into a separate escrow account (the "RETAIL ESCROW
ACCOUNT"), and held pursuant to the provisions of the Escrow Agreement.

          (d) As promptly as practicable, but in any event not later than thirty
(30) days after the Closing Date, Purchaser shall prepare and deliver to Seller
a statement calculating the Retail Inventory Value Difference (the "RETAIL
INVENTORY VALUE STATEMENT"). During the thirty (30) day period immediately
following Seller's receipt of the Retail Inventory Value Statement, Seller and
Purchaser shall each review the Product Inventory Data to evaluate the Retail
Inventory Value Statement. The Retail Inventory Value Statement shall become
final and binding upon Purchaser and Seller at the end of such thirty (30) day
period, unless Seller objects to the Retail Inventory Value Statement, in which
case it shall send written notice (the "NOTICE OF OBJECTION") to Purchaser
within such period, setting forth in specific detail the basis for its objection
and Seller's proposal for any adjustments to the Retail Inventory Value
Statement. If a timely Notice of Objection is received by Purchaser, then the
Retail Inventory Value Statement shall become final and binding (except as
provided below with respect to resolution of disputes) on Seller and Purchaser
on the first to occur of (i) the date Seller and Purchaser resolve in writing
any differences they have with respect to the matters specified in the Notice of
Objection, or (ii) the date all matters in dispute are finally resolved in
writing by the Accountants, in each case as provided below. Seller and Purchaser
shall seek in good faith to reach agreement with respect to any such proposed
adjustment or that no such adjustment is necessary within twenty (20) days
following Purchaser's receipt of the Notice of Objection. If agreement is
reached in writing within such twenty (20) day period as to all proposed
adjustments, or that no adjustments are necessary, Purchaser shall revise the
Retail Inventory Value Statement accordingly. If Seller and Purchaser are unable
to reach agreement within twenty (20) days following receipt of the Notice of
Objection, then the Accountants shall be engaged at that time to review the
Retail Inventory Value Statement, and shall make a determination as to the
resolution of any adjustments. The determination of the Accountants shall be
delivered as soon as practicable following engagement of the Accountants, but in
no event more than sixty (60) days thereafter, and shall be final, conclusive
and binding upon Seller and Purchaser and Purchaser shall revise the Retail
Inventory Value Statement accordingly. The Parties agree that judgment may be
entered on such determination in any court having jurisdiction. Seller, on the
one hand, and Purchaser, on the other hand, shall each pay one-half of the cost
of the Accountants.

                                       18



          (e) Within three (3) Business Days after the date on which the Retail
Inventory Value Statement becomes final and binding on Seller and Purchaser
pursuant to SECTION 2.8(D), then:

               (i) To the extent the Retail Inventory Value Statement (as final
and binding on the Parties in accordance with SECTION 2.8(D)) provides that
Seller owes a payment to Purchaser, Seller shall pay Purchaser an amount equal
to the amount due as follows:

                    (A) first, amounts contained in the Retail Escrow Account up
to and including the amount due shall be paid to Purchaser pursuant to the terms
of the Retail Escrow Agreement; and

                    (B) second, to the extent such amounts held in the Retail
Escrow Account are insufficient to satisfy in full such amounts due, Seller
shall pay to Purchaser an amount equal to the remaining amounts due which have
not been paid to Purchaser from the Retail Escrow Account; or

               (ii) To the extent the Retail Inventory Value Statement (as final
and binding on the Parties in accordance with SECTION 2.8(D)) provides that
Purchaser owes a payment to Seller, Purchaser shall pay Seller such amount due
(exclusive of the return of funds in the Retail Escrow Account pursuant to
SECTION 2.8(E)(III)); and

               (iii) All amounts remaining in the Retail Escrow Account (after
giving effect to SECTION 2.8(E)(I), if applicable), if any, shall be paid to
Seller pursuant to the terms of the Retail Escrow Agreement.

     2.9  ESCROW. At the Closing, Purchaser shall, in addition to any other
reductions to the Purchase Price paid at Closing to be made pursuant to this
ARTICLE II, if any, withhold Fifteen Million Dollars ($15,000,000) (the "ESCROW
AMOUNT") from the Purchase Price paid at Closing, which Escrow Amount shall be
delivered to the Escrow Agent for deposit into a separate escrow account (the
"ESCROW ACCOUNT"). The Escrow Amount shall be held pursuant to the provisions of
Escrow Agreement. The Escrow Amount will be available to compensate Purchaser
for Losses as provided in ARTICLE X, subject to the terms, conditions and
limitations in the Escrow Agreement. On the six (6)-month anniversary of the
Closing Date, Seven Million Five-Hundred Thousand Dollars ($7,500,000) (or such
lesser amount then remaining in the Escrow Account) shall be released from the
Escrow Account to Seller, PROVIDED that, if any good faith claims for
indemnification by Purchaser have been made pursuant to this Agreement and
remain unresolved at such time and an amount equal to such unresolved good faith
claims would not remain in the Escrow Account following such release from the
Escrow Account, an amount equal to such good faith claims shall remain in the
Escrow Account and all other amounts in the Escrow Account at such time, up to a
maximum of Seven Million Five-Hundred Thousand Dollars ($7,500,000), shall be
released from the Escrow Account to Seller. On the one (1)-year anniversary of
the Closing Date, all amounts then remaining in the Escrow Account shall be
released from the Escrow Account to Seller, PROVIDED that, if any good faith
claims for indemnification by Purchaser have been made pursuant to this
Agreement and remain unresolved at such time, an amount equal to such good faith
claims shall remain in the Escrow Account and all other amounts in the Escrow
Account at such time shall be released from the Escrow Account to

                                       19


Seller. If any amounts remain in the Escrow Account after the one (1)-year
anniversary of the Closing Date in order to satisfy unresolved good faith claims
for indemnification made by Purchaser pursuant to this Agreement, any and all
such amounts remaining in the Escrow Account following the resolution of such
claims, if any, shall be promptly released to Seller.

     2.10  RISK OF LOSS. Until the delivery to Purchaser pursuant to this
Agreement, following the Effective Time, any loss of or damage to the Purchased
Assets from fire, flood, casualty or any other similar occurrence shall be the
sole responsibility of Seller. As of the Effective Time, title to the Purchased
Assets shall be transferred to Purchaser. After the delivery to Purchaser
pursuant to SECTION 3.2(A)(I) following the Effective Time, Purchaser shall bear
all risk of loss associated with the Purchased Assets and shall be solely
responsible for procuring adequate insurance to protect the Purchased Assets
against any such loss.

                                  ARTICLE III
                                    CLOSING

     3.1  CLOSING. Upon the terms and subject to the conditions of this
Agreement, the Closing shall be held on a date following the satisfaction or
waiver of all of the conditions set forth in ARTICLE VII, which shall be
specified by Purchaser and be, if such conditions have been satisfied by such
time, no later than December 31, 2006, such date (the "CLOSING DATE") and take
place through facsimile exchange of signature pages together with email exchange
of electronic files in Adobe(R) PDF file format containing copies of the
executed documents, unless the Parties otherwise agree. The Parties will
exchange (or cause to be exchanged) at the Closing the funds, agreements,
instruments, certificates and other documents, and do, or cause to be done, all
of the things respectively required of each Party as specified in SECTION 3.2.
The Closing shall be deemed to have occurred at 11:59 p.m. eastern time on such
day on which the Closing occurs (the "EFFECTIVE TIME").

     3.2  TRANSACTIONS AT CLOSING. At the Closing, subject to the terms and
conditions hereof:

          (a) SELLER'S ACTIONS AND DELIVERIES. Seller shall deliver or
cause to be delivered to Purchaser:

               (i) the Inventory (which shall be delivered at the facilities of
          ICS, Mallinckrodt, Elan, and/or Cardinal, as the case may be);

               (ii) the forms of all of the Other Agreements have been mutually
          agreed by the Parties and attached to this Agreement as the
          appropriate Exhibits;

               (iii) executed counterparts of each of the Other Agreements to
          which it is a party;

               (iv) a letter from Seller to the FDA, duly executed by Seller,
          transferring the rights to the Registrations to Purchaser, in form and
          substance reasonably satisfactory to Purchaser, set forth on SCHEDULE
          3.2(A)(IV) hereto;

                                       20

               (v) a certificate of a duly authorized officer of Seller
          certifying as to the matters set forth in SECTIONS 7.2(A) and (B);

               (vi) such other documents and instruments as may be reasonably
          necessary to effect or evidence the Transactions, including, without
          limitation reasonably stored and organized Product Records;

               (vii) executed Consents to the Assignments in the forms that have
          been mutually agreed by the Parties with respect to each party set
          forth on SCHEDULE 2.5 hereto.

          (b) PURCHASER'S ACTIONS AND DELIVERIES. Purchaser shall deliver or
cause to be delivered to Seller:

               (i) the Purchase Price (subject to adjustments and reductions as
          set forth in SECTION 2.6), by wire transfer of immediately available
          funds directly to the Purchase Price Bank Account designated by
          Seller;

               (ii) the forms of all of the Other Agreements have been mutually
          agreed by the Parties and attached to this Agreement as the
          appropriate Exhibits;

               (iii) executed counterparts of each of the Other Agreements to
          which it is a party;

               (iv) a letter from Purchaser to the FDA duly executed by
          Purchaser, assuming responsibility for Registrations from Seller, in
          form and substance reasonably satisfactory to Seller, as set forth on
          SCHEDULE 3.2(B)(IV);

               (v) a certificate of a duly authorized officer of Purchaser
          certifying as to the matters set forth in SECTIONS 7.3(A) and (B); and

               (vi) such other documents and instruments as may be reasonably
          necessary to effect or evidence the Transactions.



                                   ARTICLE IV
                    REPRESENTATIONS AND WARRANTIES OF SELLER

     Seller hereby represents and warrants to Purchaser, as of the Execution
Date, as follows:

     4.1  ORGANIZATION. Seller is a corporation duly organized, validly existing
and in good standing under the laws of Delaware. Seller has all requisite
corporate power and authority to own, lease and operate, as applicable, the
Purchased Assets and to carry on the Product Line Business as presently
conducted.

     4.2  DUE AUTHORIZATION. Seller has all requisite corporate power and
authority to execute, deliver and perform its obligations under this Agreement
and the Other Agreements,

                                       21


and the execution and delivery of this Agreement and the Other
Agreements and the performance of all of its obligations hereunder and
thereunder have been duly authorized by Seller. The execution and delivery of
this Agreement and the performance by Seller of its obligations hereunder have
been authorized by all requisite board and, only as of the Closing Date, all
requisite stockholder action.

     4.3  NO CONFLICTS; ENFORCEABILITY. The execution, delivery and performance
of this Agreement and the Other Agreements by Seller (a) are not prohibited or
limited by, and will not result in the breach of or a default under, any
provision of the certificate of incorporation or bylaws of Seller or any
Subsidiary of Seller, (b) assuming all of the consents, approvals,
authorizations and permits described in SECTION 4.7 have been obtained and all
the filings and notifications described in SECTION 4.7 have been made and any
waiting periods thereunder have terminated or expired, except as would not
reasonably be expected to have a Material Adverse Effect, do not conflict with
or result in violation or breach of any Law applicable to Seller, and (c) except
as set forth on SCHEDULE 4.3 of the Seller Disclosure Schedule, does not
conflict with, result in a material breach of, constitute (with or without due
notice or lapse of time or both) a material default under, result in the
acceleration of obligations under, create in any party the right to terminate,
modify or cancel, or require any notice, consent or waiver under, any agreement,
including without limitation any Assigned Contracts, or instrument binding on
Seller prior to the Effective Time or any applicable order, writ, injunction or
decree of any court or Governmental Authority to which Seller is a party or by
which Seller is bound or to which any of its Assets is subject. This Agreement
and the Other Agreements have been duly executed and delivered by Seller, and
constitute the legal, valid and binding obligations of Seller, enforceable
against Seller in accordance with their respective terms, except as
enforceability may be limited or affected by applicable bankruptcy, insolvency,
moratorium, reorganization or other Laws of general application relating to or
affecting creditors' rights generally.

     4.4  TITLE; ASSETS. Except as set forth on SCHEDULE 4.4 of the Seller
Disclosure Schedule, Seller has good and valid title to the Purchased Assets,
whether by ownership, leases, licenses or other instruments granting Seller the
right to use the Purchased Assets, in each case free and clear of all
Encumbrances other than the Permitted Encumbrances. Neither Seller nor any
Affiliate of Seller has any right, title or interest in or to any product
containing morphine or other opioid as an active pharmaceutical ingredient in
any stage of development. Seller does not lease any manufacturing tools or test
equipment utilized in the conduct of the Product Line Business. The Purchased
Assets transferred to Purchaser pursuant to this Agreement constitute all assets
necessary and sufficient for the conduct of the Product Line Business as has
been conducted by Seller and as is presently conducted by Seller, other than
permits issued by the U.S. Drug Enforcement Agency and controlled substances
permits issued by State Governmental Authorities.

     4.5  INTELLECTUAL PROPERTY.

          (a) SCHEDULE 4.5(A) of the Seller Disclosure Schedule sets forth any
and all Patents licensed, owned or Controlled by Seller (i) pursuant to the
Product License and Supply Agreement, and/or (ii) relating to the Product or its
use or manufacture.

                                       22


          (b) Included in the Product Intellectual Property are all rights in
and to any and all Intellectual Property necessary and sufficient for the
conduct of the Product Line Business as has been conducted by Seller and as is
presently conducted by Seller, and all such rights are included in the Purchased
Assets transferred to Purchaser pursuant to this Agreement.

          (c) Except as set forth on SCHEDULE 4.5(C) of the Seller Disclosure
Schedule or as would not, individually or in the aggregate, reasonably be
expected to have a Material Adverse Effect, all Intellectual Property necessary
for the conduct of the Product Line Business is under the Control of Seller.

          (d) Except as set forth on SCHEDULE 4.5(D) of the Seller Disclosure
Schedule, (i) to Seller's Knowledge the Product Intellectual Property is
enforceable and valid and (ii) none of the Product Intellectual Property has
been or is the subject of: (A) any pending adverse judgment, injunction, order,
decree or agreement restricting (x) its use in connection with the Product or
the Product Line Business or (y) assignment or license thereof by Seller; or (B)
any threatened litigation or claim of infringement threatened or made, in each
case made in writing or to Seller's Knowledge made otherwise; or (C) any pending
litigation; or (D) any requests for royalty payments or offers for licenses to
Intellectual Property which would relate to the Product or the Product Line
Business, in each case made in writing or to Seller's Knowledge made otherwise;
or (E) to Seller's Knowledge any discussions relating to any of the matters
addressed by SECTIONS 4.5(D)(II)(B) or (D).

          (e) Except as set forth on SCHEDULE 4.5(E) of the Seller Disclosure
Schedule, all Product Intellectual Property is under the Control of Seller.

          (f) Except as set forth on SCHEDULE 4.5(F) of the Seller Disclosure
Schedule, (i) neither Seller nor any of its Affiliates has granted any licenses
to the Product Intellectual Property to third parties; (ii) neither Seller nor
any of its Affiliates, nor to Seller's Knowledge, any other Person, is party to
any agreements with third parties that materially limit or restrict use of the
Product Intellectual Property or require any payments for their use; and (iii)
to Seller's Knowledge, no other Person has any joint ownership or royalty
interest in the Product Intellectual Property.

          (g) Except as set forth on SCHEDULE 4.5(G) of the Seller Disclosure
Schedule, (i) to Seller's Knowledge, the use or sale of the Product in the
Territory, and the manufacture of the Product in the Territory or where
manufactured by or behalf of Seller for use or sale in the Territory, does not
and will not infringe any valid intellectual property right of any third party,
and (ii) neither Seller nor any of its Affiliates has received written notice of
a claim of any such infringement.

          (h) Seller has not received written notice of any misappropriation or
infringement of, any of the Product Intellectual Property by any Person.

          (i) All issuance, renewal, maintenance and other payments that are or
have become due with respect to the Product Intellectual Property have been
timely paid by or on behalf of Seller, except as would not reasonably be
expected to have a Material Adverse Effect.

                                       23

          (j) To Seller's Knowledge, there are no actual or threatened
inventorship challenges, interferences declared or assertions of invalidity with
respect to any Patents included in the Product Intellectual Property.

          (k) (i) to Seller's Knowledge, the use of the Product Mark(s) in the
Territory does not infringe any intellectual property right, including
Trademark, of any third party, and (ii) neither Seller nor any of its Affiliates
has received written notice of any such infringement claims.

          (l) Seller and its Affiliates have taken reasonable measures to
maintain in confidence all Product Know-How, except as would not reasonably be
expected to have a Material Adverse Effect.

          (m) To Seller's Knowledge, except as set forth on SCHEDULE 4.5(M) of
the Seller Disclosure Schedule, no present or former employee or consultant of
Seller and no other Person owns or has any proprietary, financial or other
interest, direct or indirect, in the Product Intellectual Property.

     4.6  LITIGATION. Except as set forth on SCHEDULE 4.6 of the Seller
Disclosure Schedule and as would not reasonably be expected to have a Material
Adverse Effect or would prevent the consummation by Seller of the Transactions,
as of the Execution Date, to Seller's Knowledge, there is no Action pending or
threatened related to the Product, the Product Line Business or the
Transactions.


     4.7  CONSENTS.  Except for the Consents to Assignments required to be
delivered by Seller to Purchaser pursuant to SECTION 7.2(C), the approval of the
Required Seller Stockholders, any requisite filings under the HSR Act and the
expiration or termination of the waiting period under the HSR Act, any other
necessary premerger or competition filings, and all of the filings and other
actions contemplated set forth on SCHEDULE 4.7 of the Seller Disclosure Schedule
(including the letters to the FDA contemplated by SECTIONS 3.2(A)(IV) and
3.2(B)(IV), any applicable filings required under the Exchange Act, any
applicable Blue Sky Laws and the rules and regulations of the Exchange, and as
may be necessary as a result of any facts or circumstances relating solely to
Purchaser), no notice to, filing with, authorization of, exemption by, or
consent of, any Person, including any Governmental Authority, is required for
Seller to consummate the Transactions, except where the failure to make such
filings or notifications, or obtain such consents, approvals, authorizations or
permits, would not, individually or in the aggregate, reasonably be expected to
have a Material Adverse Effect.

     4.8  TAXES.

          (a) There are no liens for Taxes (other than liens for current Taxes
not yet due and payable) on the Purchased Assets or the Inventory.

          (b) Except as set forth on SCHEDULE 4.8, there are no ongoing or
pending or, to Seller's Knowledge, threatened Actions or audits concerning any
Tax Liability of Seller attributable to or associated with any of the Purchased
Assets or the Product Line Business.

                                       24

     4.9  EMPLOYEE MATTERS.

          (a) PLANS AND MATERIAL DOCUMENTS. SCHEDULE 4.9 of the Seller
Disclosure Schedule lists all material Seller Plans. Seller has made available
to Purchaser a true and complete copy of each Seller Plan.

          (b) COMPLIANCE. Each Seller Plan has been operated in all material
respects in accordance with its terms and the requirements of all applicable
Laws. Seller has performed all material obligations required to be performed by
it under, is not in any material respect in default under or in material
violation of, and Seller has no Knowledge of any material default or violation
by any party to, any Seller Plan.

          (c) QUALIFICATION OF CERTAIN PLANS. Each Plan that is intended to be
qualified under Section 401(a) of the Code or Section 401(k) of the Code has
timely received a favorable determination or opinion letter from the IRS
covering all of the provisions applicable to the Seller Plan for which
determination or opinion letters are currently available that the Seller Plan is
so qualified and no fact or event has occurred since the date of such
determination or opinion letter or letters from the IRS to adversely affect the
qualified status of any such Seller Plan or the exempt status of any such trust.

          (d) COLLECTIVE BARGAINING AGREEMENTS. With respect to Product
Employees, (i) Seller is not a party to, or bound by, the terms of any
collective bargaining agreement, and is under no obligation to collectively
bargain with any labor organization as those terms are interpreted under the
federal National Labor Relations Act, (ii) Seller has experienced no material
labor difficulties during the last five (5) years, (iii) there are currently no
labor disputes involving, by way of example, strikes, work stoppages, slowdowns,
picketing, or any other forms or methods of interference with work or
production, or any other concerted action by Product Employees, (iv) there is
currently no existing or threatened grievance or other legal action arising out
of any collective bargaining agreement or employment relationship of any kind or
otherwise pending against Seller, and (v) there are currently no charges or
proceedings before the National Labor Relations Board, or other governmental
agency.

          (e) To Seller's Knowledge, all Product Employees are authorized to
work in the United States under the Immigration Reform and Control Act of 1986,
8 U.S.C. ss. 1324a, et seq.

          (f) To Seller's Knowledge, no Product Employee intends to terminate
his or her employment with Seller,

          (g) To Seller's Knowledge, (i) there are no pending or threatened
Actions (including unfair labor practice and wage/hour charges) by any Product
Employee against Seller, and (ii) none of the Product Employees have been the
subject of any such actual or threatened proceedings within the past two (2)
years, except as set forth on SCHEDULE 4.9(G) of the Seller Disclosure Schedule.

     4.10  COMPLIANCE WITH LAWS. Except as set forth on SCHEDULE 4.10 of the
Seller Disclosure Schedule:

                                       25



          (a) all Registrations employed in the Product Line Business or
necessary to the ongoing conduct of (i) the Product Line Business, or (ii) to
Seller's Knowledge, the manufacture or supply of the Product for sale in the
Territory, are in full force and effect;

          (b) except as set forth under SCHEDULE 4.10(C) of the Seller
Disclosure Schedule, Seller and its conduct of the Product Line Business are in
material compliance with all applicable Laws relating to the Product and the
Purchased Assets; and

          (c) to Seller's Knowledge, no circumstances presently exist which
would reasonably be expected to lead to any loss of or refusal to renew any
Registrations employed in the Product Line Business.

     4.11  REGULATORY MATTERS.

          (a) All existing Registrations held by Seller as of the date of this
Agreement are set forth in SCHEDULE 1.1(J). Seller is the sole and exclusive
owner of the Registrations.

          (b) To Seller's Knowledge, the Distribution of the Product by Seller
in the Territory has been conducted in material compliance with the
Registrations and all applicable Laws, including the Act and the PDM Act.

          (c) Except as set forth in SCHEDULE 4.11(C) of the Seller Disclosure
Schedule, Seller has not received any written or, to Seller's Knowledge, other
notice of proceedings from a Governmental Authority alleging that the Product or
any of the Purchased Assets or the ownership, manufacturing, operation, storage,
Distribution, warehousing, packaging, labeling, handling and/or testing thereof
is in material violation of any applicable Law.

          (d) Seller has completed and filed all annual or other reports
required by the FDA in order to maintain the Registrations to the extent
required under the Product License and Supply Agreement.

     4.12  GOVERNMENT PRODUCT CONTRACTS; LIABILITY FOR COST AND PRICING DATA.

          (a) Seller has made available to Purchaser true and correct copies of
all Government Product Contracts; PROVIDED that such copies may have been
redacted to prevent disclosure of information not related to the Product.

          (b) Seller has made available to Purchaser true and correct copies of
Seller's Non-FAMP calculations and submissions, with all supporting data, for
the two (2) most recent calendar quarters, as well as Seller's annual Federal
Ceiling Price ("FCP") calculation and submission for the FCP currently in
effect, with all supporting data.

          (c) Seller has made available to Purchaser the FCP for Product on
Seller's FSS Contract.

          (d) To Seller's Knowledge, there exists no claim for Liability against
Seller by any Governmental Authority as a result of incomplete or
Product-related defective pricing data submitted to any Governmental Authority.

                                       26

          (e) Seller has made available to Purchaser all AMP and Best Price
related submissions regarding sales of the Product during the period since the
launch of the Product as submitted to the Centers for Medicare and Medicaid
Services.

     4.13  FINANCIAL STATEMENTS. Each of the consolidated financial statements
(including, in each case, any notes thereto) contained in Seller's SEC Filings,
as amended, supplemented or restated, if applicable, was prepared in accordance
with GAAP applied (except as may be indicated in such filings and, in the case
of unaudited quarterly financial statements, as permitted by Form 10-Q under the
Exchange Act) on a consistent basis during the periods indicated (except as may
be indicated in such filings), and each, as amended, supplemented or restated,
if applicable, presented fairly, in all material respects, the consolidated
financial position of Seller as of the respective dates thereof and the
consolidated results of operations and cash flows of Seller for the respective
periods indicated therein (subject, in the case of unaudited statements, to
normal adjustments which, individually or in the aggregate, are not reasonably
expected to have a Material Adverse Effect).

     4.14  WARRANTIES. Except as set forth on SCHEDULE 4.14 of the Seller
Disclosure Schedule, Seller has not made any warranties to its customers with
respect to the quality or absence of defects of the Products which it has sold
or have been sold on its behalf which are in force as of the date hereof or with
respect to which claims are outstanding as of the date hereof. To Seller's
Knowledge, there are no claims pending, or threatened against Seller with
respect to the quality of, or existence of defects in, any such Products and, to
the Knowledge of Seller, there is no legitimate basis for any such claim. Seller
has made available to Purchaser information which is accurate in all material
respects, regarding all returns of defective or expired Products (other than
Products damaged in transit), and all credits and allowances for such defective
or expired products given or promised to customers during said period. Seller
has not paid or been required to pay or received a request or demand for payment
of any direct, incidental or consequential damages to any Person in connection
with any of such Products, except, in each case, as would not reasonably be
expected to have a Material Adverse Effect.

     4.15  BROKERS, ETC. No broker, investment banker, agent, finder or other
intermediary acting on behalf of Seller or under the authority of Seller, except
for UBS Securities LLC, is or will be entitled to any broker's or finder's fee
or any other commission or similar fee directly or indirectly in connection with
any of the Transactions.

     4.16  INVENTORY AND EQUIPMENT. To Seller's Knowledge, (i) the Product
Equipment and Inventory are free from material defects, and (ii) the Inventory
is useable, saleable and merchantable in all material respects.

     4.17  CONTRACTS.

          (a) Other than the Pre-Existing Assigned Contracts, except as set
forth on SCHEDULE 4.17(A) of the Seller Disclosure Schedule, Seller is not a
party to or bound by any material Contract that is used primarily in or is
necessary to the operation or conduct of the Product Line Business.

          (b) Except as set forth in SCHEDULE 4.17(B) of the Seller Disclosure
Schedule,

                                       27

                  (i)   all Pre-Existing Assigned Contracts listed in
SCHEDULE 1.1(B) are valid and binding on Seller and, to Seller's Knowledge, are
valid and binding on the other party or parties thereto and in full force and
effect;

                  (ii)  Seller has performed all material obligations
required to be performed by it to date under the Pre-Existing Assigned
Contracts;

                  (iii) Seller is not (with or without the lapse of time or
the giving of notice, or both) in material breach or default in any respect
thereunder;

                  (iv)  to Seller's Knowledge, no third party to any
Pre-Existing Assigned Contract is (with or without the lapse of time or the
giving of notice, or both) in breach or default in any respect thereunder; and

                  (v)   Complete and correct copies of all Pre-Existing
Assigned Contracts listed in SCHEDULE 1.1(B), together with all modifications
and amendments thereto and material correspondence related thereto, have been
made available to Purchaser.

          (c) With respect to those Assigned Contracts which Seller does not
deliver to Purchaser on or before Closing the written consent of the parties to
such Assigned Contracts regarding the assignment to Purchaser, (i) the
assignment of such Assigned Contracts to Purchaser as contemplated by the
Transactions (X) is permitted under applicable Law, (Y) shall not constitute a
default or breach of under such Assigned Contracts, and (ii) Seller has all
rights and consents necessary to effect such assignment to Purchaser as
contemplated by the Transactions, and (iii) upon such assignment to Purchaser,
Purchaser shall have all rights necessary to exercise and enforce its rights (as
assignee) under such Assigned Contracts and to require performance of the other
parties to such Assigned Contracts.

     4.18  PRODUCT LIABILITY; DISTRIBUTORS; RECALLS. To Seller's Knowledge there
is no (X) fact relating to the Product that may impose upon the Seller a duty to
recall the Product or to warn customers of a defect therein, or (Y) latent or
overt design, manufacturing or other defect in any Product. Except as set forth
on SCHEDULE 4.18 of the Seller Disclosure Schedule, Seller has not granted
rights to any third party nor appointed any third party as a licensee,
distributor or subdistributor of the Product. To Seller's Knowledge, (i) there
have been no recalls ordered by any Governmental Authority with respect to the
Product being sold by or on behalf of Seller and (ii) each of the third parties
appointed by Seller as a licensee, distributor or subdistributor of the Product
identified on SCHEDULE 4.18, if any, to Seller's Knowledge, have obtained all
approvals and clearances necessary in order to market the Product in any and all
geographic areas in which they are marketed by or on behalf of Seller.

     4.19  PRODUCT TREATMENTS; PRODUCT RETURNS; EXPORTING AND MANUFACTURING.
Except as set forth on SCHEDULE 4.19, Seller has not offered any promotional
allowance (including, without limitation, any coupon programs and co-pay
assistance programs) to any customer nor has Seller or its agents provided any
customer-specific packaging or value added services (other than displays) with
respect to the Products. Seller has processed all material returns or requests
for returns of the Products of which Seller is aware. Seller's returns policy in
effect prior to Closing and during the one (1) year period prior to the
Execution Date is attached hereto as SCHEDULE

                                       28


4.19 of the Seller Disclosure Schedule. During the one (1) year period
prior to the Execution Date, (i) Seller has processed returns consistent with
the foregoing returns policy, and (ii) except as would not reasonably be
expected to have a Material Adverse Effect, (A) Seller has not refused to accept
returns of any Products and (B) no disputes arose with any customer of Seller
regarding any attempted return to Seller of any Product sold by Seller. During
the one (1) year period prior to the Execution Date, no customer of Seller has
refused to accept further shipments of the Products. Seller does not have
outstanding any authorization to any of its customers to destroy any of the
Products in lieu of returning such product. Except as set forth on SCHEDULE 4.19
of the Seller Disclosure Schedule, the Seller has not engaged in (i) any
exporting or manufacturing activities of or relating to any Product or the
Product Line Business, or (ii) Product Line Business activities in Canada.

     4.20  CUSTOMERS, SUPPLIERS AND THIRD PARTY SERVICE PROVIDERS. Prior to the
Execution Date, Seller has provided Purchaser with a list of Seller's top ten
(10) customers by total sales of the Product for each of the three (3) most
recent calendar years (the "CUSTOMERS"). For purposes of this SECTION 4.20,
"Customer" shall mean any entity contracting with Seller to purchase the Product
whether through written contract and without regard to the end user of the goods
in question. Since January 1, 2006, no supplier or third party service provider
of Seller providing goods or services to the Product Line Business has indicated
that it shall stop, or materially decrease the rate of, providing materials,
products or services to Seller.

     4.21  MEDICAL INFORMATION. Prior to the date hereof, Seller has provided
Purchaser with access to (a) a list of all serious adverse event reports and
periodic adverse event reports with respect to the Products that have been filed
by Seller since Seller's initial launch of the Product, including any material
correspondence or other material documents relating thereto, complete copies of
which have been made available to Purchaser prior to the Effective Date, (b) all
payouts made by Seller since Seller's initial launch of the Product to end-users
in respect of claims relating to the Products and (c) all actual or threatened
claims made by end-users since Seller's initial launch of the Product against
Seller relating to the Product.

     4.22  DISCLAIMER. EXCEPT AS OTHERWISE EXPRESSLY PROVIDED IN THIS AGREEMENT,
NONE OF THE SELLER OR ITS REPRESENTATIVES MAKES OR HAS MADE ANY OTHER
REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED, WRITTEN OR ORAL, AT LAW OR IN
EQUITY, IN RESPECT OF THE PURCHASED ASSETS, ASSUMED LIABILITIES, THE PRODUCT,
THE PRODUCT INTELLECTUAL PROPERTY OR THE PRODUCT LINE BUSINESS, INCLUDING ANY
IMPLIED REPRESENTATION OR WARRANTY WITH RESPECT TO (I) MERCHANTABILITY,
NON-INFRINGEMENT, SUITABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE, (II) THE
OPERATION OF THE PRODUCT LINE BUSINESS BY PURCHASER AFTER THE CLOSING IN ANY
MANNER OTHER THAN AS USED AND OPERATED BY SELLER OR, (III) THE PROBABLE SUCCESS
OR PROFITABILITY OF THE PRODUCT LINE BUSINESS AFTER THE CLOSING.

                                       29



                                   ARTICLE V
                  REPRESENTATIONS AND WARRANTIES OF PURCHASER

         Purchaser represents and warrants to Seller as follows:

     5.1  ORGANIZATION. Purchaser is a corporation duly organized and validly
existing and in good standing under the Laws of the place of its incorporation.
Purchaser has all requisite corporate power and authority to own, lease and
operate its properties and to carry on its business as now being conducted.

     5.2  DUE AUTHORIZATION. Purchaser has all requisite corporate power and
authority to execute, deliver and perform its obligations under this Agreement
and the Other Agreements, and the execution and delivery of this Agreement and
the Other Agreements and the performance of all of its obligations hereunder and
thereunder have been duly authorized by Purchaser and, to the extent required by
Law, contract or otherwise, its stockholders.

     5.3  NO CONFLICTS; ENFORCEABILITY. The execution, delivery and performance
of this Agreement and the Other Agreements by Purchaser (a) are not prohibited
or limited by, and will not result in the breach of or a default under, any
provision of the certificate of incorporation or bylaws of Purchaser, (b)
assuming all of the consents, approvals, authorizations and permits described in
SECTION 5.5 have been obtained and all the filings and notifications described
in SECTION 5.5 have been made and any waiting periods thereunder have terminated
or expired, conflict with any Law applicable to Purchaser, and (c) does not
conflict with, result in a breach of, constitute (with or without due notice or
lapse of time or both) a default under, result in the acceleration of
obligations under, create in any party the right to terminate, modify or cancel,
or require any notice, consent or waiver under, any material agreement or
instrument binding on Purchaser prior the Closing Date or any applicable order,
writ, injunction or decree of any court or Governmental Authority to which
Purchaser is a party or by which Purchaser is bound or to which any of its
Assets is subject, except for such prohibition, limitation, default, notice,
filing, permit, authorization, consent, approval, conflict breach or default
which would not prevent or delay consummation by Purchaser of the Transactions.
This Agreement and the Other Agreements have been duly executed and delivered by
Purchaser, and constitute the legal, valid and binding obligations of Purchaser,
enforceable against Purchaser in accordance with their respective terms, except
as enforceability may be limited or affected by applicable bankruptcy,
insolvency, moratorium, reorganization or other Laws of general application
relating to or affecting creditors' rights generally.

     5.4  LITIGATION. There is no Action pending or, to Purchaser's knowledge,
threatened, directly or indirectly involving Purchaser (or to Purchaser's
knowledge, any third party) that would prohibit, hinder, delay or otherwise
impair Purchaser's ability to perform its obligations hereunder or under the
Other Agreements, including the assumption of the Assumed Liabilities, would
affect the legality, validity or enforceability of this Agreement or the Other
Agreements, or prevent or delay the consummation of the Transactions.

     5.5  CONSENTS. Except for the requisite filings under the HSR Act and the
expiration or termination of the waiting period thereunder, any other necessary
premerger or competition filings, the letters to the FDA contemplated by
SECTIONS 3.2(A)(IV) and 3.2(B)(IV), and as may be

                                       30


necessary as a result of any facts or circumstances relating solely to
Seller, no notice to, filing with, authorization of, exemption by, or consent
of, any Person, including any Governmental Authority, is required for Purchaser
to consummate the Transactions.

     5.6  FINANCING. Purchaser has sufficient immediately available funds to
pay, in cash, the Purchase Price and all other amounts payable pursuant to this
Agreement and the Other Agreements or otherwise necessary to consummate all the
Transactions.

     5.7  BROKERS, ETC. No broker, investment banker, agent, finder or other
intermediary acting on behalf of Purchaser or under the authority of Purchaser,
except for CitiGroup, is or will be entitled to any broker's or finder's fee or
any other commission or similar fee directly or indirectly in connection with
any of the Transactions.



                                   ARTICLE VI
                           COVENANTS PRIOR TO CLOSING

     6.1  ACCESS TO INFORMATION; REPORTING; CORRESPONDENCE AND NOTICES. Between
the Execution Date and the Closing Date, Seller shall, (i) afford Purchaser and
its Representatives access, during regular business hours and upon reasonable
agreed-upon times, to Seller's personnel, personnel records (relating solely to
the Product Employees, if and to the extent permitted under applicable Law, but
in any event including date of hire, current base salary, and severance for each
Product Employee calculated consistent with SCHEDULE 9.1(A)(2)), and properties
pertaining primarily or exclusively to any of the Purchased Assets, PROVIDED
that such access shall not unreasonably interfere with Seller's business and
operations; and (ii) copies of all Assigned Contracts or other documentation
constituting Purchased Assets. Without limiting the generality of the foregoing,
or being limited thereby, Seller shall, at its own cost and expense, provide to
Purchaser on (1) the last Business Day of each calendar month occurring prior to
Closing, (2) daily for each of the five (5) Business Days prior to Closing, and
(3) on the Closing Date, the following information and data ("PRODUCT INVENTORY
DATA"):

     (a) wholesale data comprised of (i) 852 reports from each distribution
services provider for the Product, (ii) inventory balances as reported on 852
forms for each wholesaler of the Product, (iii) "morgue" data for each
wholesaler of the Product, and (iv) quarter-to-date 867 information for each
wholesaler of the Product beginning July 1, 2006 through the Closing Date;

     (b) retail data comprised of (i) IMS prescription data for the Product, and
(ii) "APROV" study data for the Product; and

     (c) data relating to Inventory of Product held at ICS including the lot
numbers and expiration dates of such Inventory, as well as Seller's out of
pocket cost (without markup and appropriately supported and documented in
accordance with GAAP) paid to Elan and/or Cardinal for all such units of
Product.

Furthermore, Seller shall promptly provide Purchaser with complete copies of any
and all material correspondence, notices, subpoenas, requests, demands,
complaints or other written or electronic communications received from, or sent
by or behalf of Seller to, (X) the third parties

                                       31



identified on SCHEDULE 2.5 and any other party to an Assigned Contract, and
(Y), to the extent such correspondence or other communications relates to the
Product or the Product Line Business, to any of the top five (5) wholesalers of
the Product or the FDA, Health Canada, or any other Governmental Authority, and
(Z) any Person if it relates to any Material Adverse Effect.

     6.2  CONDUCT OF THE PRODUCT LINE BUSINESS. The Parties acknowledge that
various actions are desirable with respect to the smooth transition of the
Purchased Assets and Product Line Business from Seller to Purchaser at the
Effective Time and, consequently, Seller hereby agrees to advise Purchaser from
the date of this Agreement through the Effective Time promptly following any
material developments or changes, if any, with respect to the Purchased Assets
or the Product Line Business. In addition, each of Purchaser and Seller agree to
advise the other Party promptly upon becoming aware of any event, circumstance
or development arising subsequent to the date of this Agreement that would
result in any material breach of a representation, warranty or covenant of such
advising Party in this Agreement or that would have the effect of making any
representation or warranty of such advising Party in this Agreement untrue or
incorrect in any material respect so as to cause the failure of any Closing
condition to be satisfied prior to or at the Closing. In addition to the
foregoing, to the extent consistent with applicable Law throughout the period
between the Execution Date and the Effective Time:

     (a) except as required by Law (including the Law of fiduciary duties),
neither Purchaser nor Seller shall take any willful action reasonably likely to
result in any material representation or warranty made by such Party hereunder
to become untrue;

     (b) subject to SECTION 6.3, Seller shall exercise its reasonable best
efforts to operate the Product Line Business only in the ordinary course of
business, consistent with past practices and preserve intact in all material
respects the Purchased Assets and the Product Line Business, including, to the
extent that Seller currently has or currently purchases wholesale data in
support of the Product, Seller shall maintain such wholesale data arrangements
in all material respects;

     (c) Seller shall not mortgage, pledge or subject the Purchased Assets to
any Encumbrance (other than Permitted Encumbrances);

     (d) Seller shall not enter into any Contracts (other than Permitted
Contracts) relating primarily or exclusively to the Products or the Product Line
Business;

     (e) Seller shall not terminate Contracts that will constitute Assigned
Contracts at and as of the Effective Time;

     (f) Seller shall use its commercially reasonable efforts to maintain
satisfactory relationships with and preserve the goodwill of suppliers and
customers providing products or services primarily to or exclusively in
connection with the Product Line Business;

     (g) Seller shall not transfer or grant any rights or options in or to any
of the Purchased Assets except for the transfer of Inventory in the ordinary
course of business consistent with past practice;

                                       32


     (h) Seller shall not transfer or agree to transfer to any third party any
rights under any licenses, sublicenses or other agreements with respect to any
Product Intellectual Property;

     (i) Seller shall pay all payables and Taxes relating to the Product Line
Business;

     (j) Seller shall not fail to exercise any rights of renewal with respect to
any Assigned Contracts that by its terms would otherwise expire and which
Purchaser shall reasonably request Seller to renew;

     (k) Seller shall not (i) initiate any litigation or arbitration actions or
(ii) make any claims or demands for breach against any party to any of the
Assigned Contracts, or threaten to take any such action;

     (l) Seller shall not (i) enter into or modify any employment agreement with
a Product Employee; (ii) except in the ordinary course consistent with past
practice, increase or improve wages or fringe benefits of Product Employees, or
(iii) promote, re-assign, transfer or change the job description of any Product
Employee; and

     (l) Seller shall not agree to take any of the actions specified in this
SECTION 6.2.

     6.3  INVENTORY. Seller shall exercise its best efforts to reduce Inventory
in commercial (wholesale and retail) distribution channels to meet the Wholesale
Target and the Retail Target, PROVIDED, HOWEVER, that notwithstanding the
foregoing (i) Seller shall be entitled to ship Inventory after the Execution
Date and prior to Closing to the extent Seller determines in its reasonable
discretion that such shipments are necessary to meet its ongoing cash
requirements, and (ii) such shipments shall not be a breach of this Agreement;
PROVIDED FURTHER Seller shall provide Purchaser with advance written notice of
any such shipments. Seller shall give written notice to Purchaser of all Product
shipments made after the Execution Date promptly following each shipment. Such
notice shall set forth the quantity of the Product shipped and, to the extent
reasonably ascertainable, the then current Inventory levels in commercial
(wholesale and retail) distribution channels.

     6.4  REQUIRED APPROVALS AND CONSENTS. As soon as reasonably practicable
after the Execution Date, the Parties shall make all filings required to be made
in order to consummate the Transactions, including all filings under the HSR Act
and any other necessary premerger or competition filings in accordance with
SECTION 6.5. Seller shall also provide reasonable assistance with respect to all
filings that Purchaser elects to make which Purchaser, in its reasonable
discretion, deems legally necessary.

     6.5  HSR ACT.

          (a) If required pursuant to applicable Law, each Party shall file as
soon as practicable, and in any event no later than three (3) Business Days
after the execution of a LOI by the Parties, or if no LOI is executed by the
Parties, after the Execution Date except as mutually agreed otherwise, a
Notification and Report Form under the HSR Act with the United States Federal
Trade Commission and the Antitrust Division of the United States Department of
Justice, as well as any other necessary premerger or competition filings. As
deemed advisable,

                                       33

each Party shall respond as promptly as practicable to any inquiries
or requests received from any Governmental Authority in the Territory for
additional information or documentation. Each Party shall (i) promptly notify
the other Party of any communication to that Party or its Affiliates from any
Governmental Authority and, subject to applicable Law, permit the other Party or
the other Party's counsel to review in advance any proposed written
communication to any of the foregoing; (ii) not participate, or permit its
Affiliates to participate, in any substantive meeting or discussion with any
Governmental Authority in respect of any filings, investigation or inquiry
concerning this Agreement unless it consults with the other Party in advance
and, to the extent permitted by such Governmental Authority in the Territory,
gives the other Party the opportunity to attend and participate thereat; and
(iii) subject to applicable Law and any other reasonable confidentiality
obligations of the disclosing Party, furnish the other Party with copies of all
correspondence, filings, and communication (and memoranda setting forth the
substance thereof) (including documents submitted as attachments to each Party's
Notification and Report Form under the HSR Act) between such Party (its
affiliates, and its respective Representatives) on the one hand, and any
Governmental Authority or members of their respective staffs on the other hand,
with respect to this Agreement. The responsibility for any required HSR Act
filing fees shall be split 50/50 between Purchaser and Seller.

          (b) In furtherance and not in limitation of the other covenants of the
Parties contained herein, Purchaser shall have the right, but not the
obligation, to seek to remedy any material competition concerns that any
Governmental Authority may have with respect to the consummation of the
Transactions. If any administrative, judicial or legislative Action is
instituted (or threatened to be instituted) challenging the sale and purchase of
the Purchased Assets or any of the Transactions as violative of any
anti-competition Law, Purchaser may, but shall not be required to, elect to
contest and resist any such Action, and to have vacated, lifted, reversed or
overturned any decree, judgment, injunction or other order that is in effect and
that restricts, prevents or prohibits the consummation of the Transactions. In
the event Purchaser elects not to seek to remedy any such competition concerns
of a Governmental Authority after being given notice thereof, Seller may
terminate this Agreement by giving notice of termination to Purchaser. Seller
shall cooperate in a commercially reasonable manner with any efforts of
Purchaser to remedy any such competition concerns of a Governmental Authority.

     6.6  PROXY STATEMENT; SELLER STOCKHOLDERS' MEETING.

          (a) PROXY STATEMENT. As promptly as practicable after the Execution
Date, Seller shall prepare and file with the SEC a proxy statement relating to
Seller Stockholders' Meeting (together with any amendments thereof or
supplements thereto, the "PROXY STATEMENT"). Seller, after consultation with
Purchaser, will use commercially reasonable efforts to respond to any comments
made by the SEC with respect to the Proxy Statement and to make any further
filings in connection therewith Seller in its reasonable discretion deems
necessary or appropriate. Purchaser shall furnish all information as Seller may
reasonably request in connection with such actions and the preparation of the
Proxy Statement. As promptly as practicable after the clearance of the Proxy
Statement by the SEC, Seller shall mail the Proxy Statement to its stockholders.
Subject to SECTION 6.7, the Proxy Statement shall include the Seller
Recommendation. Seller will notify Purchaser, promptly after it receives notice
thereof, of any request by the SEC for amendment of the Proxy Statement or
comments thereon and responses thereto or requests by the SEC for additional
information. Seller shall supply

                                       34


Purchaser with copies of all written correspondence between Seller or any
of its Representatives, on the one hand, and the SEC or the SEC's staff or any
other governmental officers, on the other hand, with respect to the Proxy
Statement or the Transactions; PROVIDED, HOWEVER, that nothing herein shall
obligate Seller to disclose any written information submitted to the SEC for
which Seller has obtained confidential treatment thereof from the SEC. If at any
time prior to the Effective Time, any event or circumstance relating to
Purchaser or any Affiliate of Purchaser, or their respective Representatives,
should be discovered by Purchaser which should be set forth in an amendment or a
supplement to the Proxy Statement, Purchaser shall promptly inform Seller. If at
any time prior to the Effective Time, any event or circumstance relating to
Seller or any Subsidiary of Seller, or their respective Representatives, should
be discovered by Seller which should be set forth in an amendment or a
supplement to the Proxy Statement, Seller shall promptly inform Purchaser. All
documents that Seller is responsible for filing in connection with the
Transactions will comply as to form and substance in all material respects with
the applicable requirements of the Exchange Act and other applicable Laws.

          (b) INFORMATION SUPPLIED. The Proxy Statement is Seller's document and
Seller shall be and remain solely responsible for its contents. All documents
that Seller is responsible for filing with the SEC in connection with the
Transactions will comply as to form in all material respects with the applicable
requirements of the Exchange Act and will not contain any untrue statement of a
material fact, or omit to state any material fact required to be stated therein
in order to make the statements therein, in light of the circumstances under
which they were made, not misleading.

          (c) SELLER STOCKHOLDERS' MEETING. Subject to this SECTION 6.6, Seller
shall mail the Proxy Statement to its stockholders and call and hold a meeting
of its stockholders (the "SELLER STOCKHOLDERS' MEETING") in accordance with
Seller's bylaws and applicable Law as promptly as practicable following the date
on which the Proxy Statement is cleared by the SEC for the purpose of obtaining
the approval of the Required Seller Stockholders. Subject to Seller's fiduciary
duties and applicable Law, Seller will use its commercially reasonable efforts
to solicit from its stockholders proxies in favor of the adoption and approval
of this Agreement and the Transactions, and will take all other reasonable
action, if any, deemed necessary by Seller to secure the approval of its
stockholders (by vote or consent) required by applicable Law, Seller's
certificate of incorporation and bylaws, each as amended to date, and, if
applicable, all Contracts binding on Seller. The Proxy Statement will contain
the Seller Recommendation; PROVIDED, HOWEVER, that no director or officer of
Seller shall be required to violate any fiduciary duty or other requirement
imposed by Law in connection therewith.

          (d) CONVERTIBLE NOTES. Prior to Seller Stockholders' Meeting, Seller
shall mail to each of the holders of the Convertible Notes a notice of
redemption pursuant to Section 3.04 of the Indenture entered into by Seller and
dated as of November 26, 2002. Without limiting the foregoing or being limited
thereby, Seller shall have redeemed or converted all of the Convertible Notes by
the earlier of the Closing Date or the Outside Date. Seller shall not disperse
or otherwise distribute to any of its stockholders any proceeds from any sale of
Seller's assets prior to (i) the redemption or conversion of all of the
Convertible Notes and (ii) repayment in full of any indebtedness owed to
Purchaser by Seller.

                                       35

          (e) NO RESTRICTION. Nothing in this SECTION 6.6 shall be deemed to
prevent Seller or the board of directors of Seller from taking any action they
are permitted or required to take under, and in compliance with, SECTION 6.6 or
are required to take under applicable Law. Nothing contained in this Agreement
shall give Purchaser, directly or indirectly, the right to control or direct
Seller's or its Subsidiaries' operations prior to the Effective Time.

     6.7  NO NEGOTIATION. Between the Execution Date and the Closing Date,
Seller agrees it shall not, and shall cause its Affiliates and Representatives
not to, directly or indirectly, take any action to (i) solicit, initiate or
facilitate any Acquisition Proposal, (ii) as to any such Acquisition Proposal,
participate in any way in discussions or negotiations with, or furnish any
non-public information to, any Person that has made an Acquisition Proposal or
(iii) enter into any agreement with respect to any Acquisition Proposal;
PROVIDED, however, that, at any time prior to the Closing Date, Seller shall,
following the provision of notice to Purchaser, be permitted to:

          (a) participate in any discussions or negotiations with, and provide
any non-public information (other than any confidential information of Purchaser
or any non-public financial or other material terms of this Agreement) to, any
Person in response to an Acquisition Proposal by any such Person, if the board
of directors of Seller determines that there is a reasonable likelihood that
such Acquisition Proposal could lead to a Superior Proposal;

          (b) if Seller has received an Acquisition Proposal from a third party
and the board of directors of Seller determines that such Acquisition Proposal
constitutes a Superior Proposal, effect a change in the Seller Recommendation or
enter into an agreement with respect to such Acquisition Proposal;

          (c) effect a change in the Seller Recommendation if the board of
directors of Seller determines that doing so is consistent with its fiduciary
duties to Seller's stockholders under applicable Law; and

          (d) take and disclose to Seller's stockholders a position with respect
to any tender offer or exchange offer by a third party or amend or withdraw such
a position in accordance with Rule 14d-9 and Rule 14e-2 of the Exchange Act.

     6.8  NOTIFICATIONS. Between the Execution Date and the Closing Date,
Seller, on the one hand, and Purchaser, on the other hand, shall promptly notify
the other Party in writing of any fact, change, condition, circumstance or
occurrence or nonoccurrence of any event of which it is aware that will or is
reasonably likely to result in any of the conditions set forth in ARTICLE VII
becoming incapable of being satisfied; PROVIDED, HOWEVER, that the delivery of
any notice pursuant to this SECTION 6.8 shall not limit or otherwise affect the
remedies available hereunder to the Party receiving such notice.

     6.9  PRODUCT PACKAGING.

          (a) Following the Execution Date, Purchaser shall exercise its
reasonable best efforts to obtain its own NDC number for the Product and develop
and obtain governmental approval of its own proposed packaging for the Product
for use by Purchaser upon Closing, in

                                       36


each case at Purchaser's sole cost and expense (including, without
limitation, any fees, expenses or costs associated with converting at
Purchaser's request existing Inventory to reflect Purchaser's packaging for the
Product).

          (b) In order ensure the Parties' compliance with Drug
Enforcement Administration guidelines and requirements and to facilitate a more
efficient transfer of the Product and Product Line Business to Purchaser upon
Closing, Seller shall, in cooperation with Purchaser, use commercially
reasonable efforts (i) to arrange, effective upon a date mutually agreed upon by
the Parties, for Elan and Cardinal to appropriately hold and store in unlabeled
bottles (e.g., "bright stock") at their respective manufacturing sites all
production of Product currently scheduled to be produced and shipped to ICS
between execution and Closing; and (ii) upon appropriate lead time, to arrange
for Elan and Cardinal to label such Product using labeling made available by
Purchaser but retain possession of such packaged Product until the date of
Closing. In the event this Agreement is terminated, Purchaser shall pay for all
reasonable costs and expenses to label with Seller's label all such Purchaser
labeled Product.

     6.10  FURTHER ASSURANCES; FURTHER DOCUMENTS.

          (a) As of the Execution Date, each of the Parties shall use its
commercially reasonable efforts, in the most expeditious manner practicable, (i)
to satisfy or cause to be satisfied all the conditions precedent that are set
forth in ARTICLE VII, as applicable to each of them, (ii) to cause the
Transactions to be consummated, and (iii) without limiting the generality of the
foregoing, to obtain all consents and authorizations of third parties and to
make all filings with, and give all notices to, third parties that may be
necessary or reasonably required on its part in order to consummate the
Transactions.

          (b) Each of Purchaser and Seller shall, and shall cause its respective
Affiliates to, at the request of another Party, execute and deliver to such
other Party all such further instruments, assignments, assurances and other
documents as such other Party may reasonably request in connection with the
carrying out of this Agreement and the Transactions.

                                  ARTICLE VII
                             CONDITIONS TO CLOSING

     7.1  CONDITIONS PRECEDENT TO OBLIGATIONS OF PURCHASER AND SELLER. The
respective obligations of Purchaser and Seller to consummate the Transactions on
the Closing Date are subject to the satisfaction or waiver (in accordance with
SECTION 12.7) at or prior to the Closing Date of the following conditions:

          (a) LITIGATION. No preliminary or permanent injunction or other order
has been issued by any court or by any Governmental Authority, body or authority
which enjoins, restrains, prohibits or makes illegal pursuant to applicable Law
the Transactions on the Closing Date.

          (b) HSR ACT. Any waiting period (and any extension thereof) under the
HSR Act applicable to the Transactions has expired or been terminated.

                                       37

          (c) STOCKHOLDER APPROVAL. The Required Seller Stockholders shall have
approved stockholder resolutions authorizing Seller to consummate the
Transactions.

     7.2  CONDITIONS PRECEDENT TO PURCHASER'S OBLIGATIONS. Purchaser's
obligations to consummate the Transactions shall be subject to the fulfillment
of each of the following additional conditions, any one or more of which may be
waived, at Purchaser's sole discretion, in writing by Purchaser:

          (a) REPRESENTATIONS AND WARRANTIES. The representations and warranties
of Seller contained in ARTICLE IV shall be true and correct in all material
respects as of the Execution Date and true and correct in all material respects
as of the Effective Time as though made on and as of the Effective Time (except
that those representations and warranties which address matters only as of a
particular date need only be true and correct as of such date).

          (b) PERFORMANCE. Seller shall have performed and complied in all
material respects with each of the covenants, agreements and obligations Seller
is required to perform under this Agreement on or before the Closing.

          (c) CONSENTS. All Consents to the Assignments shall have been duly
executed and delivered to Purchaser; provided that with respect to each of
Seller's Contracts with ICS or Stericycle (formerly Universal Solutions
International Inc.) relating to the Product, if, prior to Closing Purchaser
shall have entered into its own contracts with such third parties regarding
Purchaser's conduct of the Product Line Business following Closing, Seller shall
be relieved of its obligation to obtain Consent to Assignment of such Contracts.

          (d) OFFICER'S CERTIFICATE. Purchaser shall have received a certificate
executed by a duly elected, qualified and acting officer of Seller certifying to
the satisfaction of the conditions set forth in SECTIONS 7.2(A) and (B).

          (e) OTHER AGREEMENTS. Seller shall have duly executed and delivered to
Purchaser the Other Agreements.

          (f) CONVERTIBLE NOTES. Seller shall have redeemed or converted all of
the Convertible Notes.

     7.3  CONDITIONS PRECEDENT TO SELLER'S OBLIGATIONS. Seller's obligation to
consummate the Transactions shall be subject to the fulfillment of each of the
following additional conditions, any one or more of which may be waived, at
Seller's sole discretion, in writing by Seller:

          (a) REPRESENTATIONS AND WARRANTIES. Each of the representations and
warranties of Purchaser contained in ARTICLE V shall be true and correct in all
material respects as of the Execution Date and as of the Effective Time as
though made on and as of the Effective Time (except that those representations
and warranties which address matters only as of a particular date need only be
true and correct as of such date).

          (b) PERFORMANCE. Purchaser shall have performed and complied in all
material respects with each of the covenants, agreements and obligations
Purchaser is required to perform under this Agreement on or before the Closing.


                                       38

          (c) OFFICER'S CERTIFICATE. Seller shall have received a certificate
executed by a duly elected, qualified and acting officer of Purchaser certifying
to the satisfaction of the conditions set forth in SECTIONS 7.3(A) and (B).

          (d) OTHER AGREEMENTS. Purchaser shall have duly executed and delivered
the Other Agreements to Seller.

                                  ARTICLE VIII
                              ADDITIONAL COVENANTS

     8.1  CONFIDENTIALITY; PUBLICITY.

          (a) The terms of the Confidentiality Agreement shall apply to any
information provided to Seller or Purchaser pursuant to this Agreement.

          (b) The Parties shall jointly agree upon the necessity and content of
any press release in connection with the execution of this Agreement and the
matters contemplated hereby as well as the Closing of the Transactions
hereunder. Any other publication, news release or other public announcement by a
Party relating to this Agreement or to the performance hereunder shall first be
reviewed and consented to in writing by the other Party; PROVIDED, HOWEVER, that
notwithstanding any contrary term contained in the Confidentiality Agreement,
(i) any disclosure that is required by Law as advised by the disclosing Party's
counsel may be made without the prior written consent of the other Party,
provided a copy of such disclosure is provided to the other Party prior to any
such legally required disclosure, and (ii) any Party may issue a press release
or public announcement if the contents of such press release or public
announcement have previously been made public other than through a breach of
this Agreement by the issuing Party, without the prior written consent of the
other Party. To the extent practicable, the disclosing Party shall give at least
three (3) Business Days advance notice of any such legally required disclosure
to the other Party, and such other Party may provide any comments on the
proposed disclosure during such period and if not practicable, such lesser
practicable period, if any. Notwithstanding any contrary term contained in the
Confidentiality Agreement, to the extent that either Party determines that it or
the other Party is required to file or register this Agreement, a summary
thereof or a notification thereof to comply with the requirements of an
applicable stock exchange, Exchange regulation, New York Stock Exchange
regulation or Nasdaq regulation or any Governmental Authority, including without
limitation the SEC, such Party shall give at least two (2) Business Days advance
written notice of any such required disclosure to the other Party. Prior to
making any such filing, registration or notification, the Parties shall reach
mutual agreement with respect thereto regarding any confidential treatment
request. The Parties shall cooperate, each at its own expense, in such filing,
registration or notification, including without limitation such confidential
treatment request, and shall execute all documents reasonably required in
connection therewith.

     8.2  AVAILABILITY OF RECORDS. After the Closing, Seller, on the one hand,
and Purchaser, on the other hand, shall make available to each other Party and
its Affiliates and Representatives during normal business hours when reasonably
requested, all Product Records in its possession and shall preserve all such
information, records and documents until the later of:

                                       39


(i) six (6) years after the Closing; (ii) the expiration of all statutes of
limitations for assessing or collecting Taxes for periods ending on
or prior to the Closing and periods including the Closing Date, including
extensions thereof applicable to Seller or Purchaser; or (iii) the required
retention period under any applicable Laws for all such information, records or
documents (it being understood that the Parties shall not be required to provide
any Tax Returns to any Person, other than as required by applicable Laws).
Purchaser and Seller shall also make available to each other during normal
business hours, when reasonably requested, personnel responsible for preparing
or maintaining information, records and documents, in connection with Tax
matters, governmental contracts, litigation or potential litigation, each as it
relates to the Product, Product Line Business, Purchased Assets or Assumed
Liabilities prior to the Closing Date (with respect to Seller) or from and after
the Closing Date (with respect to Purchaser), including product liability and
general insurance liability.

     8.3  NOTIFICATION OF CUSTOMERS. Promptly after the Closing, Purchaser and
Seller shall jointly notify all wholesale distributors of the Product (a) of the
transfer of the Purchased Assets to Purchaser, (b) that all purchase orders for
the Product received by Seller or any of its Affiliates prior to the Closing
Date but not shipped prior to 11:59 p.m. eastern time on or prior to the
Business Day immediately preceding the Closing Date will be transferred to
Purchaser (PROVIDED that to the extent that any purchase order cannot be so
transferred, Seller and Purchaser shall cooperate with each other to ensure that
such purchase order is filled and that Purchaser receives the same economic
benefit and assumes the same Liability associated with filling such purchase
order as if such purchase order had been so transferred), and (c) that all
purchase orders for the Product received after the Closing Date should be sent
to the Persons and addresses as directed by Purchaser.

     8.4  PRODUCT RETURNS, REBATES AND CHARGEBACKS.

          (a) PRODUCT RETURNS.

               (i) Purchaser shall be responsible for all Product returns from
and after the Closing Date other than with respect to any returns of the Product
sold prior to the Effective Time for which Seller shall be and remain
responsible for processing after the Closing Date. A list of all lot numbers of
Product sold by Seller since the launch of the Product and to the Closing Date
is attached at SCHEDULE 8.4(A). The Parties shall use, and cause any third party
return processing service providers to use, the foregoing list to determine
which Party shall be responsible for returns of a particular lot of Product.

               (ii) The Party responsible for the returns of the Product in a
given lot number and/or NDC shall be responsible for processing such returns as
well as be financially responsible for such returns. Seller and Purchaser shall
issue joint instructions in writing to third parties from which Product returns
may be expected hereunder and otherwise reasonably cooperate with one another to
help ensure Product returns are made in an appropriate manner.

               (iii) Notwithstanding any provision herein to the contrary,
Purchaser and its Affiliates shall not take any action with the intention of
encouraging or otherwise affirmatively causing Seller's customers and
distributors to return Products.

                                       40

          (b) GOVERNMENT REBATES.

               (i) Seller shall be responsible for all claims for all rebates
pursuant to any governmental rebate program ("GOVERNMENT REBATES") for Products
dispensed prior to the Effective Time; PROVIDED that Seller's responsibility
with respect to such Government Rebates shall terminate 180 days following the
Closing Date (the "REBATE TAIL PERIOD") and, after the termination of the Rebate
Tail Period, Purchaser shall be responsible for legally and accurately
calculated Government Rebates owed by Seller for Products dispensed prior to the
Effective Time (to the extent not previously paid by Seller) and, in addition,
for the avoidance of doubt, Purchaser shall be responsible for all Government
Rebates for Products dispensed after the Effective Time. Purchaser acknowledges
that Seller will require certain information from Purchaser in order to
calculate the Government Rebates for Product bearing NDC numbers of Seller or
any of its Affiliates. Seller acknowledges that Purchaser will require certain
information from Seller to meet its obligations with regard to pricing and
calculating Government Rebates. Accordingly, the Parties agree that, from and
after the Closing Date until the date which is one (1) calendar year after the
expiration date of the last lot of Product produced with any NDC number of
Seller, each Party shall reasonably cooperate with the other Party in connection
with appropriately submitting to the Centers for Medicare and Medicaid Services,
and in providing to the other Party, the following information: (a) the Best
Price for each Product identified by NDC number, (b) the "average manufacturer
price" ("AMP") (as defined under the Social Security Act, 42 U.S.C. ss.
1396r-8(k)(1)) for each Product identified by the NDC number, (c) all data used
by Purchaser or Seller to calculate the AMP and Best Price for each Product
identified by NDC number, and (d) any additional pricing and/or claims data or
other information related to such Medicaid issues reasonably requested by the
other Party. Without limiting the generality of the foregoing, or being limited
thereby, Purchaser shall make all appropriate filings (even after Closing, as
necessary) with the Centers for Medicare and Medicaid Services in regard to all
pre-Closing sales of Product, including any filings covering Seller's sales of
Product in a partial calendar quarter period leading up the Closing Date.

               (ii) Purchaser shall pay or reimburse Seller for legally and
accurately calculated Government Rebates owed by Seller to any Governmental
Authority (to the extent not previously paid by Seller) following the
termination of Government Rebate Tail Period; PROVIDED, that the Parties
acknowledge that Government Rebates are billed on a calendar quarter basis and,
to the extent that Purchaser's reimbursement obligations under this SECTION
8.4(B)(II) commence following the first (1st) day of any calendar quarter,
Purchaser shall reimburse Seller in an amount equal to the total amount of the
Government Rebates billed to Seller for such quarter, multiplied by a fraction,
the numerator of which shall be the number of days elapsed during such quarter
for which Purchaser has a reimbursement obligation under this SECTION 8.4(B),
and the denominator of which shall be the number of days elapsed during such
calendar quarter. Seller shall submit an invoice to Purchaser for the amount due
from Purchaser to Seller hereunder within ten (10) Business Days after receipt
by Seller of any claim for a Government Rebate for which Purchaser may be
responsible under this SECTION 8.4(B). Purchaser shall make all payments due
under this SECTION 8.4(B) to Seller upon receipt by Purchaser of invoices from
Seller that describe the requested payments in reasonable detail. IN NO EVENT
SHALL SELLER OR ANY GOVERNMENTAL AUTHORITY CLAIM, AND PURCHASER SHALL NOT BE
OBLIGATED TO REIMBURSE SELLER FOR OR PAY ANY GOVERNMENTAL AUTHORITY FOR ANY
GOVERNMENT REBATES THAT ARE NOT OWED BY SELLER

                                       41


OR ARE NOT BASED UPON LEGALLY AND ACCURATELY CALCULATED INFORMATION SUBMITTED
TO GOVERNMENTAL AUTHORITIES BY SELLER.

               (iii) If Purchaser disputes in good faith any Government Rebate
claimed by Seller to be owed by Purchaser to Seller under any invoice submitted
to Purchaser pursuant to SECTION 8.4(B)(II), Purchaser shall provide notice to
Seller within ten (10) Business Days of receipt of such invoice requesting that
Seller notify the applicable Governmental Authority that Purchaser disputes such
claim and the reasonable basis therefor. Seller shall, to the extent not part of
the Purchased Assets, provide to Purchaser, upon Purchaser's reasonable request,
copies of any documents and records evidencing the original Government Rebate
claims and any resubmission of such claims and data relating to unit Government
Rebate calculations that are reasonably necessary to enable Purchaser to resolve
such disputed amount. Purchaser shall be responsible for managing the dispute
and amount owed under any such disputed Government Rebate, and Seller shall
provide reasonable assistance to Purchaser in its dispute thereof; PROVIDED that
Purchaser shall reimburse Seller for any and all reasonable costs and expenses
incurred by Seller as a result of Purchaser's dispute of such Government Rebate.

               (iv) Notwithstanding the other provisions of this SECTION 8.4,
the Parties acknowledge that the VA National Acquisition Center must approve the
addition of the Product to Purchaser's Federal Supply Schedule ("FSS") Contract
and the removal of the Product from Seller's FSS Contract before the
responsibility of processing such chargebacks is transferred from Seller to
Purchaser. Until such approval is obtained, Seller shall continue to be
responsible for processing the FSS chargebacks on Purchaser's behalf, at
Purchaser's sole costs and expense (with Purchaser promptly paying such costs
and expenses as they become due or promptly reimbursing Seller for such costs as
paid by Seller), in each case in a manner consistent with this Agreement. Seller
shall provide Purchaser with all information reasonably related to the Product
and the prices thereof that Purchaser reasonably requires in order to comply
with applicable rules and regulations relating to P.L. 102-585 as it relates to
the FSS. When requested, such information shall be provided by Seller to
Purchaser as promptly as practicable.

               (v) SCHEDULE 8.4(B) sets forth the "BEST PRICE" (as defined at 42
U.S.C. ss. 1396r-8(c)(1)(C)) and AMP reported by Seller for the Product for the
two most recently ended calendar quarters.

          (c) COMMERCIAL REBATES. Seller shall be responsible for all claims for
all commercial rebates for Products sold prior to the Effective Time; PROVIDED
that Seller's responsibility with respect to such commercial rebates shall
terminate upon termination of the Rebate Tail Period and thereafter Purchaser
shall be responsible for commercial rebates (to the extent not already paid by
Seller) for Products sold prior to the Effective Time and, in addition, for the
avoidance of doubt, Purchaser shall be responsible for all claims for commercial
rebates for Products sold after the Effective Time. SCHEDULE 8.4(C) hereto
contains a list of all commercial rebate agreements, commercial chargeback
agreements and Medicare Part D agreements in which the Product is included
("COMMERCIAL REBATE AGREEMENTS"). Seller and Purchaser agree that Purchaser
shall continue to honor all such Commercial Rebate Agreements following the
Effective Time; PROVIDED, HOWEVER, that Seller shall exercise its reasonable
best efforts to terminate each such Commercial Rebate Agreement promptly
following the Closing and no later than ten (10) Business Days thereafter and
shall notify Purchaser in writing of such

                                       42


terminations in accordance with the applicable agreement. Upon
termination of such agreements, Seller's Liability for such rebates and
chargebacks shall cease. Seller shall be responsible at Sellers' sole cost and
expense for the processing, payment, administration, support, and termination of
all such Commercial Rebate Agreements. To the extent that Purchaser processes
commercial rebates and chargebacks that are the responsibility of Seller, Seller
shall reimburse Purchaser within thirty (30) days of receipt of Purchaser's
invoices for the same together with appropriate documentation supporting such
claim, including without limitation, the lot numbers, NDC number, the
party/customer filing for the rebates and chargebacks and identification of the
contract under which the Product in question with purchased. Similarly, to the
extent that Seller processes commercial rebates and chargebacks for Product sold
under Seller's NDC by or on behalf of Purchaser after the Effective Time,
Purchaser shall reimburse Seller within thirty (30) days of receipt of Seller's
invoices for the same. Any disputes with respect to such amounts due (and the
related costs of any Accountants incurred in connection therewith, if any) shall
be resolved in the manner set forth in SECTION 2.8(D).

          (d) CREDITS SHELF STOCK ADJUSTMENTS. Notwithstanding the foregoing,
Purchaser and Seller agree that (i) Seller shall not be responsible for credits
shelf stock adjustments to the extent resulting from price decreases initiated
by Purchaser after Closing and (ii) any such payments by Seller shall be made on
the terms and conditions comparable to Seller's rebate obligations as of the
Closing with respect to each commercial customer and shall be based on Seller's
terms of agreement with the respective contract. To the extent that Seller
processes such claims, Purchaser shall reimburse Seller within thirty (30) days
of receipt of invoices that describe the requested payments in reasonable
detail.

     8.5   ACCOUNTS RECEIVABLE. The Parties acknowledge and agree that all
Accounts Receivable are and shall after Closing remain the property of Seller
and Seller's Affiliates and shall be collected by Seller or Seller's Affiliates
subsequent to the Closing. In the event that, subsequent to the Closing,
Purchaser or Purchaser's Affiliates receives any payments from any obligor with
respect to an Account Receivable outstanding on the Closing Date, then Purchaser
shall within thirty (30) days of receipt of such payment remit the full amount
of such payment to Seller. In the case of the receipt by Purchaser of any
payment from any obligor of both Seller and Purchaser then, unless otherwise
specified by such obligor, such payment shall be applied first to amounts owed
to Purchaser with the excess, if any, remitted to Seller. In the event that,
subsequent to the Closing, Seller or Seller's Affiliates receives any payments
from any obligor with respect to an account receivable of Purchaser for any
period after the Closing Date, then Seller shall within thirty (30) days of
receipt of such payment remit the full amount of such payment to Purchaser. In
the case of the receipt by Seller of any payment from any obligor of both Seller
and Purchaser then, unless otherwise specified by such obligor, such payment
shall be applied first to amounts owed to Seller with the excess, if any,
remitted to Purchaser.

     8.6  REGULATORY MATTERS.

          (a) From and after the Closing Date, Purchaser, at its cost, shall be
solely responsible and liable for (i) taking all actions, paying all fees and
conducting all communication with the appropriate Governmental Authority
required by Law in respect of the Registrations, including preparing and filing
all reports (including adverse drug experience

                                       43


reports) with the appropriate Governmental Authority (whether the Product is
sold before or after transfer of such Registrations), (ii) taking all actions
and conducting all communication with third parties with respect to Product sold
pursuant to such Registrations (whether sold before or after transfer of such
Registrations), including responding to all complaints in respect thereof,
including complaints related to tampering or contamination, and (iii)
investigating all complaints and adverse drug experiences with respect to
Product sold pursuant to such Registrations (whether sold before or after
transfer of such Registrations).

          (b) From and after the Closing Date, Seller promptly (and in any event
within the time periods required by Law) shall notify Purchaser within three (3)
Business Days if Seller receives a complaint or a report of an adverse drug
experience with respect to the Product, but within twenty-four (24) hours if
Seller receives a complaint or a report of a serious adverse drug experience. In
addition, Seller shall cooperate with Purchaser's reasonable requests and use
commercially reasonable efforts to assist Purchaser in connection with the
investigation of and response to any complaint or adverse drug experience
related to the Product sold by Seller.

          (c) From and after the Closing Date, Purchaser, at its cost, shall be
solely responsible and liable for conducting all voluntary and involuntary
recalls of units of the Product sold pursuant to such Registrations (whether
sold before or after transfer of such Registrations), including recalls required
by any Governmental Authority and recalls of units of the Product sold by Seller
deemed necessary by Seller in its reasonable discretion; PROVIDED, HOWEVER, that
Seller shall promptly reimburse Purchaser for all reasonable expenses and costs
incurred by Purchaser relating to recalls (whether voluntary or required by any
Governmental Authority) relating to Product sold by or on behalf of Seller prior
to the Closing, including without limitation the costs of notifying customers,
the costs associated with shipment of such recalled Product, the price paid for
such Product, and reasonable credits extended to customers in connection with
the recall. Seller promptly shall notify Purchaser in the event that a recall of
the Product sold by Seller is necessary.

     8.7  WEBSITE INFORMATION. As soon as practicable following the Closing
Date, but in no event less than ten (10) Business Days following the Closing
Date, Seller shall remove all references to the Product from the "Product
Information" and "Research and Development" sections of its website; PROVIDED
upon request of Purchaser, Seller shall place a link to website(s) designated
by Purchaser.

     8.8  TAX MATTERS.

          (a) Seller and Purchaser shall reasonably cooperate with one another
to lawfully minimize all Transfer Taxes, and resulting Transfer Taxes, if any,
shall be split by Purchaser and Seller 50/50. Seller and Purchaser shall
cooperate in preparing and timely filing all Tax Returns and other documentation
relating to such Transfer Taxes as may be required by applicable Tax Law.

          (b) Seller and Purchaser hereby waive compliance with any "bulk sales"
Laws (including any requirement to withhold any amount from payment of the
Purchase Price) applicable to the sale to Purchaser of the Purchased Assets and
the Inventory by Seller.

                                       44

8.9      GOVERNMENT PRODUCT CONTRACTS.

                  (a) After the Effective Time, Purchaser shall honor and
perform all Liabilities of Seller arising after the Effective Time under and
pursuant to each Government Product Contract with respect to supplying the
Product to the applicable party pursuant to such Government Product Contract
until such time as the VA permits Purchaser add the Product to its FSS Contract.
Seller agrees that, except as otherwise required by applicable Law, after the
Effective Time it will not take any action with respect to any Government
Product Contract that would, to Seller's Knowledge, extend the term of such
Government Product contract with respect to the Product or otherwise adversely
affect Purchaser or the Product Line Business, without the prior consent of
Purchaser. Seller may enter into a separate agreement with such government
party, PROVIDED that such agreements do not contain any provisions relating to
the Product or the Product Line Business.

                  (b) Seller shall provide Purchaser with all information and
data reasonably requested by Purchaser necessary for Purchaser to add the
Product to its FSS Contract to the extent not included in the Purchased Assets.
Seller shall terminate the rights and obligations of Seller with respect to the
Product under each such government product contract, to the extent permitted by
the terms thereof and to the extent permitted by, and in accordance with,
applicable Law, as soon as reasonably practicable after notification from
Purchaser that the Product has been added to Purchaser's FSS Contract.

                  (c) Seller shall provide Purchaser all data related to
Seller's sales of Product necessary for Purchaser to calculate a new Federal
Ceiling Price under the Veterans Health Care Act, 38 U.S.C. ss. 8126.

     8.10  INSURANCE. Seller shall maintain, at its expense, general liability
insurance together with product liability coverage for sales of the Product made
prior to the Closing Date, which shall be written by A-rated insurance carriers
as rated by A.M. Best Company, having a limit of not less than Ten Million
Dollars ($10,000,000) in the aggregate, for a period of three (3) years
following the Closing Date. Such insurance shall name each of King, King R&D and
their respective Affiliates as additional named insureds. Seller shall provide
to Purchaser thirty (30) days prior written notice of any cancellation or change
in any of the foregoing coverage. Prior to Closing and thereafter upon request
of Purchaser, Seller shall provide to Purchaser certificates of insurance
evidencing the foregoing coverage.

     8.11  PRODUCT PROMOTION.

     (a) Purchaser shall exercise commercially reasonable efforts to promote the
Product during the Royalty Term. Commercially reasonable efforts to promote
shall mean (except to the extent the FDA, the U.S Drug Enforcement
Administration or a court of competent jurisdiction finally and conclusively
determines that Purchaser is legally prohibited from doing so): (a) for the
period during the Royalty Term from the Closing Date through December 31, 2008,
that Purchaser shall cause to be performed a minimum of 15,000 PDEs per calendar
month (pro-rated for partial months); and (b) for the period during the Royalty
Term from January 1, 2009 through December 31, 2009, that Purchaser shall cause
to be performed a minimum of 10,000 PDEs per month (pro-rated for partial
months); PROVIDED that, in each case, such PDEs shall be calculated

                                       45



on a quarterly basis. Thereafter, during the remainder of the Royalty Term,
commercially reasonable efforts shall mean at least the same degree of effort as
exercised in the promotion of Purchaser's other products of a similar market
size, patent life and similar commercial opportunity.

     (b) Purchaser shall exercise commercially reasonable efforts to explore
alternate formulations and derivations of the Product which utilize the same
single active ingredient as the Product.

     (c) During the Royalty Term, Purchaser shall not market in the Territory
for once-daily administration any controlled release solid oral dosage
formulation containing morphine and its salts as its sole active ingredient,
other than Product.

     (d) Purchaser confirms that it has received a copy of the Product License
and Supply Agreement. Purchaser agrees that it shall be bound by the provisions
of the Product License and Supply Agreement and shall perform in accordance with
its terms all the obligations which by the terms of the Product License and
Supply Agreement are required to be performed by Seller. Without limiting the
foregoing, Purchaser acknowledges the foregoing covenant shall continue
throughout the duration of the Royalty Term.

     8.12  ADVISORY FEES, ETC. Seller will provide for the transfer, on the
Closing Date, to UBS Securities LLC (who is an intended third-party beneficiary
of this paragraph) a cash amount sufficient to pay in full all amounts due and
payable to UBS Securities LLC in connection with the Transactions.

                                   ARTICLE IX
                                EMPLOYEE MATTERS

     9.1  EMPLOYEE OFFERS.

          (a) Effective as of the Effective Time, Purchaser or an Affiliate of
Purchaser shall offer to employ, on an at-will basis, each of the Product
Employees listed on SCHEDULE 9.1(A)(1) (provided that such list shall in no
event exceed eighty-seven (87) individuals, and after review of the employment
records and/or interview of each listed individual (which in no event shall
occur prior to HSR approval), Purchaser, in its discretion, may decline to offer
employment to any Product Employee for valid, job-related reasons and provided
further that Purchaser, in its discretion, will determine its staffing needs and
therefore the aggregate number of Product Employees to be offered employment and
the tasks to be performed by them) so long as (i) each such employee is
currently performing his or her regular tasks during what have been customarily
scheduled work hours for its salespersons; (ii) as of the Effective Time, each
such employee is then able to perform the essential functions of the positions
to be offered by Purchaser, with or without reasonable accommodation, and (iii)
each such employee is already subject to or, prior to hire by Purchaser, signs a
trade secret, confidentiality, "work for hire," non-compete, and any other
similar agreement or agreements proffered by and with Purchaser, with such
employment, if accepted, to commence as of the Effective Time. Such offers of
employment shall be delivered to applicable Product Employees at least five (5)
Business Days prior to the Closing or as soon as practicable thereafter but, in
any event, prior to the Closing.

                                       46



The Product Employees who become employed by Purchaser are herein referred to as
the "HIRED EMPLOYEES".

          (b) On or before the effective date of hire by Purchaser, Seller shall
terminate the employment of each Hired Employee and all Hired Employees shall
cease participation in all Seller Plans, subject to the terms of such plans.

          (c) All Product Employees on SCHEDULE 9.1(A)(1) who receive no
employment offers from Purchaser will remain employees of Seller, or, at
Seller's option, Seller will sever their employment. If such employment
severance occurs within ten (10) Business Days following the Closing Date,
Seller shall treat such Product Employees as terminated employees under the
severance pay policy attached hereto as SCHEDULE 9.1(A)(2), and, to the extent
they are eligible for severance pay under such policy, will, at Seller's
discretion, offer them severance pay consistent with SCHEDULE 9.1(A)(2).
Purchaser agrees to reimburse Seller for the amount of severance pay paid out to
such severed Product Employees only to the extent (i) Purchaser has not offered
employment to such Product Employees pursuant to SECTION 9.1(A) above, and (ii)
such severance pay is properly paid out in accordance with the severance pay
policy attached hereto as SCHEDULE 9.1(A)(2), including without limitation that
each such severance pay-eligible Product Employee submits to Seller and
Purchaser a valid, binding, signed release of all possible legal claims against
Seller and Purchaser in a form and in substance acceptable to Seller and
Purchaser. Seller shall otherwise remain solely liable for the severance of such
severed Product Employees.

          (d) Seller, at the request of Purchaser, shall enforce, now or in the
future, any non-competition, non-solicitation, confidentiality, trade secret or
like agreements between Seller and any of its employees, including any Product
Employees, who have any confidential knowledge or information about the Product
Line Business or have had any role in Distribution of the Product.

     9.2  BENEFITS.

          (a) Seller shall pay out to each Hired Employees any and all vacation
pay, personal pay, and sick leave benefits earned but not yet used as of the
date on which each such employee terminates employment with Seller in order to
commence employment with Purchaser.

          (b) Seller shall retain responsibility for and continue to pay all
workers' compensation, medical and dental and similar plan benefits for each
Hired Employee with respect to claims incurred by such Hired Employee or his or
her covered dependents under the Seller Plans prior to the Closing Date and
beyond the Closing Date, to the extent the benefit-triggering event occurred
prior to Closing and Liability continues after Closing. Without limiting the
generality of SECTION 9.2, Seller and its Affiliates shall retain sole
responsibility for all Liabilities in respect of continuation coverage of health
insurance under Section 4980B of the Code or Part 6 of Title I of ERISA or other
similar state or local law to Product Employees and any other current and former
employees of Seller and their Affiliates and their eligible dependents with
respect to "qualifying events" (as defined in Section 4980B of the Code)
occurring prior to the Closing Date. Purchaser shall be responsible for
satisfying all obligations

                                       47


under Section 4980B of the Code or Part 6 of Title I of ERISA or other similar
state or local law with respect to any Hired Employee with respect to
"qualifying events" occurring on or after the Closing Date.

     9.3  WARN ACT. Purchaser shall be responsible for all Liabilities,
obligations, costs, claims, proceedings and demands, under the WARN Act, or any
state plant closing or notification law, or similar Law in other jurisdictions,
arising out of, or relating to, (i) in respect of Product Employees, the failure
of Purchaser to offer employment to Product Employees in accordance with SECTION
9.1(A), or (ii) in respect of Hired Employees, any actions taken by Purchaser or
its Affiliates on or after the Closing Date; so long as any information provided
by Seller and relied upon by Purchaser is accurate, and with the further
understanding, that Purchaser shall not be responsible for any such Liabilities,
obligations, costs, claims, proceedings and demands to or in respect of any
employees of Seller other than the Product Employees.

     9.4  EMPLOYEE INFORMATION. Following the Execution Date, Seller shall use
commercially reasonable efforts to provide Purchaser with all information and
data reasonably requested by Purchaser in connection with Purchaser's rights and
obligations under this ARTICLE IX, including exchanging information and data
relating to employee employment history and benefits and employee benefit plan
coverages (except to the extent prohibited by applicable Law).

                                   ARTICLE X
                                 INDEMNIFICATION

     10.1  INDEMNIFICATION BY SELLER. For purposes of determining the existence
and amount of Seller's indemnification obligations hereunder, a breach of
Seller's representations or warranties shall be determined without regard to any
limitation or qualification as to materiality or Material Adverse Effect (or
similar concept) set forth in such representation or warranty. Seller shall
indemnify Purchaser and its Affiliates and their respective, officers,
directors, employees, stockholders, agents and Representatives against, and hold
them harmless from, any Losses, to the extent arising from:

          (a) any breach of any representation or warranty of Seller contained
in this Agreement or Seller's Officer's Certificate;

          (b) any pre-Closing activities of Seller, including but not limited to
Seller's returns pertaining to sales of the Product before the Closing or
termination of this Agreement;

          (c) any breach of any covenant of Seller contained in this Agreement;

          (d) any Excluded Liabilities; and

          (e) any fees, expenses or other payments incurred or owed by Seller to
any brokers, financial advisors or comparable other Persons retained or employed
by it in connection with the Transactions.

     10.2  INDEMNIFICATION BY PURCHASER. Purchaser shall indemnify Seller and
its Affiliates and their respective officers, directors, employees,
stockholders, agents and Representatives

                                       48



against, and agrees to hold them harmless from, any Losses, to the extent
arising from or in connection with or otherwise with respect to:

          (a) any breach of any representation or warranty of Purchaser
contained in this Agreement or Purchaser's Officer's Certificate;

          (b) any breach of any covenant of Purchaser contained in this
Agreement;

          (c) any Assumed Liability; and

          (d) any fees, expenses or other payments incurred or owed by Purchaser
to any brokers, financial advisors or other comparable Persons retained or
employed by it in connection with the Transactions.

     10.3  PROCEDURES.

          (a) In order for a Party (the "INDEMNIFIED PARTY") to be entitled to
any indemnification provided for under this Agreement in respect of, arising out
of or involving a claim made by any Person against the Indemnified Party (a
"THIRD PARTY CLAIM"), such Indemnified Party must notify the indemnifying party
(the "INDEMNIFYING PARTY") in writing (and in reasonable detail) of the Third
Party Claim within fifteen (15) Business Days after receipt by such Indemnified
Party of notice of the Third Party Claim; PROVIDED, HOWEVER, that failure to
give such notification shall not affect the indemnification provided hereunder
except to the extent the Indemnifying Party shall have been actually prejudiced
as a result of such failure (except that the Indemnifying Party shall not be
liable for any expenses incurred during the period in which the Indemnified
Party failed to give such notice). Thereafter, the Indemnified Party shall
deliver to the Indemnifying Party, within five Business Days' after the
Indemnified Party's receipt thereof, copies of all notices and documents
(including court papers) received by the Indemnified Party relating to the Third
Party Claim.

          (b) If a Third Party Claim is made against an Indemnified Party, the
Indemnifying Party shall be entitled to participate in the defense thereof and,
if it so chooses, to assume the defense thereof with counsel selected by the
Indemnifying Party. If the Indemnifying Party assumes such defense, the
Indemnified Party shall have the right to participate in the defense thereof and
to employ counsel, at its own expense, separate from the counsel employed by the
Indemnifying Party, it being understood that the Indemnifying Party shall
control such defense. The Indemnifying Party shall be liable for the reasonable
fees and expenses of counsel employed by the Indemnified Party for any period
during which the Indemnifying Party has not assumed the defense thereof (other
than during any period in which the Indemnified Party shall have failed to give
notice of the Third Party Claim as provided above). If the Indemnifying Party
chooses to defend or prosecute a Third Party Claim, all Indemnified Parties
shall cooperate in the defense or prosecution thereof. Such cooperation shall
include the retention and (upon the Indemnifying Party's request) the provision
to the Indemnifying Party of records and information that are reasonably
relevant to such Third Party Claim, and making employees and Representatives
available on a mutually convenient basis to provide additional information and
explanation of any material provided hereunder or other matters reasonably
related to such Third Party Claim. Whether or not the Indemnifying Party assumes
the defense of a Third Party

                                       49



Claim, the Indemnified Party shall not admit any liability with respect to,
or settle, compromise or discharge, such Third Party Claim without
the Indemnifying Party's prior written consent (which consent shall not be
unreasonably withheld). If the Indemnifying Party assumes the defense of a Third
Party Claim, the Indemnified Party shall agree to any settlement, compromise or
discharge of a Third Party Claim that the Indemnifying Party may recommend and
that by its terms obligates the Indemnifying Party to pay the full amount of the
Losses in connection with such Third Party Claim, which releases the Indemnified
Party completely in connection with such Third Party Claim and that would not
otherwise materially adversely affect the Indemnified Party.

          (c) In the event any Indemnified Party should have a claim against any
Indemnifying Party under SECTION 10.1 or 10.2 that does not involve a Third
Party Claim being asserted against or sought to be collected from such
Indemnified Party, the Indemnified Party shall deliver notice of such claim with
reasonable promptness to the Indemnifying Party, but in any event not later than
five (5) Business Days after the Indemnified Party determines that it has or
could have a claim to indemnification hereunder, stating the amount of Loss, if
known, and method of computation thereof, and containing a specific reference to
the provisions of this Agreement in respect of which such right of
indemnification is claimed or arises. The failure by any Indemnified Party so to
notify the Indemnifying Party shall not relieve the Indemnifying Party from any
indemnification obligation that it may have to such Indemnified Party under
SECTION 10.1 or 10.2, as applicable, except to the extent that the Indemnifying
Party is prejudiced by such failure. If the Indemnifying Party disputes that it
has an indemnification obligation with respect to such claim, the Indemnifying
Party shall deliver notice of such dispute with reasonable promptness and the
Indemnifying Party and the Indemnified Party shall proceed in good faith to
negotiate a resolution of such dispute for a period of thirty (30) days
following the receipt by the Indemnified Party of such dispute notice. If the
Indemnified Party and the Indemnifying Party have not resolved such dispute
during such time period through good faith negotiations, such dispute shall be
resolved by litigation in an appropriate court of competent jurisdiction or
other mutually agreeable non-judicial dispute resolution mechanism.

     10.4  CERTAIN LIMITATIONS ON INDEMNIFICATION OBLIGATIONS. Purchaser shall
not be entitled to receive any indemnification payments under this ARTICLE X
unless and until the aggregate amount of all indemnifiable Losses incurred by
Purchaser equals One Million Five Hundred Thousand Dollars ($1,500,000) (the
"BASKET AMOUNT"), whereupon Purchaser shall be entitled to receive in full
indemnity payments for all such Losses that exceed the Basket Amount; PROVIDED
that the maximum aggregate amount of indemnification payments under this ARTICLE
X to which Purchaser shall be entitled shall not exceed Forty Million Dollars
($40,000,000); PROVIDED FURTHER that Purchaser shall not be permitted to submit
a claim for indemnification if aggregate Losses with respect to such claim are
less than Two Thousand Five Hundred Dollars ($2,500).

     10.5  SET-OFF. Any indemnifiable Losses to which Purchaser is entitled
pursuant to the provisions of this Article X shall be satisfied as follows:
first, such Losses shall be satisfied from the Escrow Account pursuant to the
terms of the Escrow Agreement; second, subject to the provisions of this Article
X, such Losses shall be set-off against Royalties then accrued but not paid to
Seller hereunder to the extent no amounts remain in the Escrow Account; and
third, to the extent, and only to the extent, unable to be satisfied from the
Escrow Account and the Royalties,

                                       50



directly from Seller. Any payment for indemnifiable Losses determined to be
due to Purchaser pursuant to this Article X from the Escrow Account, or any
set-off against Royalties due and payable to Seller for indemnifiable Losses
determined to be due to Purchaser pursuant to this Article X, shall be made
within ten (10) days following the determination (in accordance with this
Article X) of the amount of such indemnifiable Losses due and payable to
Purchaser.

     10.6  SURVIVAL. Seller's indemnification obligation hereunder shall survive
sixteen (16) months after the Closing Date, PROVIDED, HOWEVER, that Seller's
indemnification obligation for Seller's breach of SECTIONS 4.2, 4.4 or 4.9 shall
survive for a period of thirty (30) months after the Closing Date.
Notwithstanding the foregoing, indemnification obligations of an Indemnifying
Party shall survive the foregoing termination dates with respect to matters that
the Indemnified Party has in good faith provided notice to the Indemnifying
Party prior to the applicable termination date pursuant to SECTION 10.3 above,
and the Indemnifying Party's obligation shall be tolled until such matters are
definitively resolved.

                                   ARTICLE XI
                            TERMINATION AND SURVIVAL

     11.1  TERMINATION.

          (a) This Agreement may be terminated:

               (i) at any time before the Closing Date by mutual written consent
          of Purchaser and Seller; or

               (ii) by either Party, in writing, if the Transactions have not
          been consummated on or before December 31, 2006 (the "OUTSIDE DATE"),
          PROVIDED that such failure is not due to the failure of the Party
          seeking to terminate this Agreement to comply in all material respects
          with its obligations under this Agreement; or

               (iii) by either Party if the adoption of this Agreement by the
          Required Seller Stockholders shall not have been obtained at Seller's
          Stockholders' Meeting (or at any adjournment thereof) by reason of the
          failure to obtain the required vote; or

               (iv) by either Party, if a material breach of any provision of
          this Agreement has been committed by the other Party, such breach has
          not been waived and such breach is not cured within sixty (60) days
          after written notice thereof.

          (b)  This Agreement may be terminated by Seller before Closing, in
          writing, if:

               (i) (A) any representation or warranty of Purchaser set forth in
          this Agreement shall have become untrue in any material respect or
          Purchaser has materially breached any covenant or agreement of
          Purchaser set forth in this Agreement, and (B) such breach or
          misrepresentation is not capable of being cured prior to the Outside
          Date;

                                       51


               (ii) a material breach of any provision of this Agreement has
          been committed by Purchaser, such breach has not been waived by Seller
          and such breach is not cured by Purchaser within ten (10) days after
          written notice thereof or, in the reasonable determination of Seller,
          is incapable of being cured by Purchaser; or

               (iii) the board of directors of Seller determines that an
          Acquisition Proposal is a Superior Proposal, in which case Seller
          must, within two (2) days thereafter, provide Purchaser written notice
          of such determination.

           (c) This Agreement may be terminated by Purchaser before Closing,
in writing, if:

               (i) (A) any representation or warranty of Seller set forth in
          this Agreement shall have become untrue in any material respect or
          Seller has materially breached any covenant or agreement of Seller set
          forth in this Agreement, and (B) such breach or misrepresentation is
          not capable of being cured prior to the Outside Date;

               (ii) a material breach of any provision of this Agreement has
          been committed by Seller and such breach is not cured by Seller within
          ten (10) days after written notice thereof or, in the reasonable
          determination of Purchaser, is incapable of being cured by Seller; or

               (iii) if, prior to obtaining the approval of this Agreement by
          the Required Seller Stockholders (A) Seller has failed to include the
          Seller Recommendation in the Proxy Statement or (B) the board of
          directors of Seller approves or recommends an Acquisition Proposal to
          Seller's stockholders or approves or recommends that its stockholders
          tender their shares of Seller's common stock in any tender offer or
          exchange offer that is an Acquisition Proposal; or

               (iv) Purchaser has received written notice from Seller indicating
          that Seller's board of directors has determined that an Acquisition
          Proposal is a Superior Proposal.

     11.2 PROCEDURE AND EFFECT OF TERMINATION.

          (a)  Upon termination of this Agreement by Seller or Purchaser
pursuant to SECTION 11.1, written notice thereof shall forthwith be given to the
other Party and this Agreement shall terminate forthwith and become void and
there shall be no Liability or obligation on the part of the Parties or their
respective Representatives. Termination of this Agreement shall terminate all
outstanding obligations and liabilities between the Parties arising from this
Agreement except those described in: (i) SECTION 8.1, this ARTICLE XI and
ARTICLE XII; (ii) the Confidentiality Agreement; and (iii) any other provisions
of this Agreement which by their nature are intended to survive any such
termination.

                                       52


          (b) In the event that this Agreement is terminated by Seller pursuant
to (i) SECTION 11.1(B)(III) or (ii) by Purchaser pursuant to SECTIONS
11.1(C)(III) or (IV), Seller shall pay King a fee equal to Twelve Million
Dollars ($12,000,000) (the "TERMINATION FEE") by wire transfer of immediately
available funds to an account designated by King in writing. The Termination Fee
shall be paid promptly, but in no event later than three (3) Business Days after
the date of receipt by Seller of such wiring instructions. Receipt of the
Termination Fee shall be Purchaser's sole and exclusive remedy against Seller
for accepting a Superior Proposal.

          (c) In the event that this Agreement is terminated by Seller pursuant
to SECTION 11.1(B)(I) or SECTION 11.1(B)(II) then, in addition to any other
remedies available to Seller under this Agreement, Purchaser shall pay to Seller
within two (2) Business Days after the receipt of a notice therefor an amount
equal to Seller's reasonable out-of-pocket expenses in connection with the
negotiation, execution and delivery of this Agreement and the actions taken in
furtherance of the consummation of this Agreement, by wire transfer of
immediately available funds to an account designated by Seller in writing.

          (d) In the event that this Agreement is terminated by Purchaser
pursuant to SECTION 11.1(C)(I) or SECTION 11.1(C)(II) then, in addition to any
other remedies available to Purchaser under this Agreement, Seller shall pay to
King within two (2) Business Days after the receipt of a notice therefor an
amount equal to Purchaser's reasonable out-of-pocket expenses in connection with
the negotiation, execution and delivery of this Agreement and the actions taken
in furtherance of the consummation of this Agreement, by wire transfer of
immediately available funds to an account designated by King in writing.

                                  ARTICLE XII
                                 MISCELLANEOUS

     12.1 ASSIGNMENT; BINDING EFFECT. This Agreement shall be binding upon and
inure to the benefit of the Parties hereto and their respective successors and
assigns; PROVIDED, HOWEVER, that Purchaser may not sell, transfer, assign,
license, sublicense, delegate, pledge or otherwise dispose of, whether
voluntarily, involuntarily, by operation of Law or otherwise, this Agreement or
any of its rights or obligations under this Agreement without the prior written
consent of Seller, which consent may be granted, withheld or conditioned at
Seller's sole and absolute discretion; PROVIDED, FURTHER notwithstanding the
foregoing Purchaser may assign its rights under this Agreement as security to
one or more financial institutions providing financing (not in relation to the
Closing of the Transactions contemplated hereunder) to Purchaser and may be
assigned pursuant to the terms of the relevant security agreement; PROVIDED,
FURTHER, that any permitted assignment shall protect Seller's rights under this
Agreement.

     12.2 EXPENSES. Except as otherwise specified herein, each Party shall bear
its own expenses with respect to the Transactions.

     12.3 NOTICES. All notices, requests, claims, demands and other
communications hereunder shall be in writing and shall be deemed to have been
duly given (a) when received if delivered personally, (b) upon receipt, if sent
by registered or certified mail (postage prepaid, return receipt requested) and
(c) the day after it is sent, if sent for next-day delivery to a domestic
address by overnight mail or courier, to the Parties at the following addresses:

                                       53




                  If to Seller, to:

                           Ligand Pharmaceuticals Incorporated
                           10275 Science Center Drive
                           San Diego, California 92121
                           Attention: General Counsel

                  with a copy sent concurrently to:

                           Latham & Watkins LLP
                           12636 High Bluff Drive, Suite 400
                           San Diego, California 92130
                           Attn: Scott Wolfe
                           Attn: Faye Russell

                  If to Purchaser, to:

                           King Pharmaceuticals, Inc.
                           501 Fifth Street
                           Bristol, Tennessee 37620
                           Attention: General Counsel, Legal Affairs

                  with copies sent concurrently to:

                           King Pharmaceuticals, Inc.
                           400 Crossing Boulevard
                           Bridgewater, New Jersey 08807
                           Attention:  General Counsel, Legal Affairs

                           Reed Smith LLP
                           Princeton Forrestal Village
                           136 Main Street, Suite 250
                           Princeton, New Jersey 08540
                           Attn: Andres Liivak

PROVIDED, HOWEVER, that if any Party shall have designated a different address
by notice to the others, then to the last address so designated.

     12.4 SEVERABILITY. If any term, provision, covenant or restriction of this
Agreement is held by a court of competent jurisdiction or other authority to be
invalid, void, unenforceable or against its regulatory policy such determination
shall not affect the enforceability of any others or of the remainder of this
Agreement.

     12.5 ENTIRE AGREEMENT. This Agreement may not be amended, supplemented or
otherwise modified except by an instrument in writing signed by all of the
Parties hereto. This Agreement, the Other Agreements and the Confidentiality
Agreement contain the entire

                                       54



agreement of the Parties hereto with respect to the Transactions,
superseding all negotiations, prior discussions and preliminary agreements made
prior to the Execution Date

     12.6 NO THIRD PARTY BENEFICIARIES. Except as otherwise set forth under
ARTICLE IX, this Agreement is solely for the benefit of the Parties hereto and
their respective Affiliates and no provision of this Agreement shall be deemed
to confer upon any third parties any remedy, claim, Liability, reimbursement,
claim of action or other right in excess of those existing without reference to
this Agreement.

     12.7 WAIVER. The failure of any Party to enforce any condition or part of
this Agreement at any time shall not be construed as a waiver of that condition
or part, nor shall it forfeit any rights to future enforcement thereof.

     12.8 GOVERNING LAW; JURISDICTION. Except for federal Laws referenced in
this Agreement, and except as superseded by federal Law, this Agreement
(including any claim or controversy arising out of or relating to this
Agreement) shall be governed by the law of the State of New York without regard
to conflict of law principles that would result in the application of any Law
other than the Law of the State of New York. All Actions arising out of or
relating to this Agreement shall be heard and determined exclusively in the
Court of Chancery of the State of Delaware, and any appellate court from any
thereof, in any Action arising out of or relating to this Agreement, the Other
Agreements, the Transactions or for recognition or enforcement of any judgment
relating thereto, and each of the Parties hereby irrevocably and unconditionally
(a) agrees not to commence any such Action except in such courts, (b) agrees
that any claim in respect of any such Action may be heard and determined in the
Court of Chancery of the State of Delaware, (c) waives, to the fullest extent it
may legally and effectively do so, any objection which it may now or hereafter
have to the laying of venue of any Action in the Court of Chancery of the State
of Delaware, and (d) waives, to the fullest extent permitted by Law, the defense
of an inconvenient forum to the maintenance of such Action in the Court of
Chancery of the State of Delaware. Each of the Parties hereto agrees that a
final judgment in any such Action shall be conclusive and may be enforced in
other jurisdictions by suit on the judgment or in any other manner provided by
Law. Each Party to this Agreement irrevocably consents to service of process in
the manner provided for notices in SECTION 12.4. Nothing in this Agreement will
affect the right of any Party to this Agreement to serve process in any other
manner permitted by Law.

     12.9 INJUNCTIVE RELIEF. Notwithstanding anything to the contrary in this
Agreement, either Party will have the right to seek temporary injunctive relief
in any court of competent jurisdiction as may be available to such Party under
the Laws applicable in such jurisdiction with respect to any matters arising out
of the other Party's performance of its obligations under this Agreement. Either
Party agrees that in the event the other Party institutes an appropriate Action
seeking injunctive/equitable relief for specific performance under this
Agreement, the Party seeking such relief shall not be required to provide the
other Party with service of process of a complaint and summons under the
procedures set forth in any Canadian or other non-United States judicial process
or system. Under such circumstances, the Party seeking such relief need only
provide the other Party with two copies of a true, correct and lawfully issued
summons and complaint, via Federal Express (priority delivery).

                                       55


     12.10 HEADINGS. The headings of the sections and subsections of this
Agreement are inserted for convenience only and shall not be deemed to
constitute a part hereof.

     12.11 COUNTERPARTS. This Agreement may be executed manually, electronically
in Adobe(R) PDF file format, or by facsimile by the Parties, in any number of
counterparts, each of which shall be considered one and the same agreement and
shall become effective when a counterpart hereof shall have been signed by each
of the Parties and delivered to the other Party.

     12.12 SCHEDULES. Purchaser agrees that any disclosure by Seller in any
Schedule attached hereto shall not establish any threshold of materiality or
concede the materiality of any matter or item disclosed.

     12.13 CONSTRUCTION. The language in all parts of this Agreement shall be
construed, in all cases, according to its fair meaning. The Parties acknowledge
that each Party and its counsel have reviewed and revised this Agreement and
that any rule of construction to the effect that any ambiguities are to be
resolved against the drafting Party shall not be employed in the interpretation
of this Agreement.


                              * * * * * * * * * * *

                                       56






         IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be
executed by their respective duly authorized officers as of the date first above
written.



                  LIGAND PHARMACEUTICALS INCORPORATED

                  By: /S/ HENRY F. BLISSENBACH
                      ----------------------------------------

                  Name:    HENRY F. BLISSENBACH
                        --------------------------------------

                  Title:   CHAIRMAN AND CEO
                        --------------------------------------



                  KING PHARMACEUTICALS, INC.

                  By:    /S/ BRIAN A. MARKISON
                      ----------------------------------------

                  Name:    BRIAN A. MARKISON
                        --------------------------------------

                  Title:   PRESIDENT AND CEO
                        --------------------------------------



                  KING PHARMACEUTICALS RESEARCH AND DEVELOPMENT, INC.

                  By:    /S/ BRIAN A. MARKISON
                      ----------------------------------------

                  Name:    BRIAN A. MARKISON
                        --------------------------------------

                  Title:   PRESIDENT AND CEO
                        --------------------------------------

                                       57



                                 SCHEDULE 1.1(B)

                         PRE-EXISTING ASSIGNED CONTRACTS

(a) Requires Consent

Amended and Restated License & Supply Agreement between ELAN CORPORATION PLC,
Elan Management Limited and Ligand Pharmaceuticals Incorporated dated December
6, 2002.

Manufacturing and Packaging Agreement by and between CARDINAL HEALTH PTS LLC and
Ligand Pharmaceuticals Incorporated dated 13 February 2004; First Amendment to
the Manufacturing and Packaging Agreement by and between Cardinal Health PTS LLC
and Ligand Pharmaceuticals Incorporated dated July 1 2006.

Co- Promotion Agreement by and between Ligand Pharmaceuticals Incorporated and
ORGANON PHARMACEUTICALS USA, INC. dated 1st January 2003; First Amendment to the
Co-Promotion Agreement effective as of October 1, 2003

Termination & Return of Rights Agreement by and between Ligand Pharmaceuticals
Incorporated and ORGANON USA INC. (assignee of Organon Pharmaceuticals USA,
Inc.) effective as of January 1, 2006.

Pharmaceutical Return Goods Servicing Agreement by and between UNIVERSAL
SOLUTIONS INTERNATIONAL, INC. (now Stericycle Direct Return) and Ligand
Pharmaceuticals Incorporated dated as of May 15, 2003; Letter Amendment dated
January 17, 2005

Commercial Outsourcing Services Agreement entered into March 1, 2002 by and
between INTEGRATED COMMERCIALIZATION SOLUTIONS, INC. and Seller, as amended by:
Amendment No. 1 to Ligand Service Agreement dated September 4, 2003, Amendment
No. 2 to Ligand Service Agreement dated September 28, 2004, Amendment to
Commercial Outsourcing Services Agreement dated July 22, 2004, Fourth Amendment
to Commercial Outsourcing Services Agreement dated January 24, 2005, and Fifth
Amendment to Commercial Outsourcing Services Agreement dated April 29, 2005.
(partial assignment only)

Quality Agreement for Avinza(R) dated April 10, 2006 between CARDINAL HEALTH
PTS, LLC and Seller.

Technical Agreement Avinza(R) dated June 10, 2003 between ELAN HOLDINGS,
INCORPORATED and Seller.

Cardinal Health PTS, LLC and Elan Corporation, plc to the assignment to
Purchaser of (a) the Agreement dated September 20, 2003 between Cardinal Health
PTS, LLC, ELAN CORPORATION, PLC and Seller, and (b) the Amended and Restated
Confidentiality Agreement Avinza(R) dated February 13, 2004 and effective as of
August 30, 2003, between Cardinal Health PTS, LLC, ELAN CORPORATION, PLC and
Seller.

                                       58


McKesson Health Solutions Arizona Inc. to the assignment to Purchaser of (a) the
Trial Script(R) Program Agreement dated February 9, 2004 and (b) the First
Amendment to Ligand Pharmaceuticals TrialScript(R) Program Agreement For Avinza,
in each case between McKesson Health Solutions Arizona Inc. and Seller.



(b) Consent not Required

             PO      APPROVE       DELIVERY                                        ACCT           ORIGINAL    INVOICED      OPEN
   DEPT    NUMBER  DATE              DATE             VENDOR               NAME                      AMOUNT     AMOUNT   COMMITMENT
                                                                                                  
   6000    1004253   07/12/2006   12/31/2006    MCKESSON SPECIALTY          COUPON PROGRAM           342,000      54,872   287,128
                                                                            BROCHURE
   6000    1004253   07/12/2006   12/31/2006    MCKESSON SPECIALTY          PRODUCTION/REPRINTS      143,000               143,000
   6000    999577    09/09/2005   12/31/2005    MCKESSON SPECIALTY          COUPON PROGRAM           200,000     170,610    29,390
   6000    1004711   04/11/2006   06/30/2006    MCKESSON CORPORATION        SPECIAL PROGRAMS           4,500                 4,500
                                                                            OTHER TRADE SHOW
   6010    1004334   03/10/2006   05/01/2006  MERISOURCE BERGEN CORP        EXPENSES                   8,500                 8,500
                                                                            OTHER TRADE SHOW
   6010    1004336   03/10/2006   05/01/2006          NACDS                 EXPENSES                   8,300                 8,300
                                                                            OTHER TRADE SHOW
   6010    1004335   03/10/2006   06/01/2006           NCPA                 EXPENSES                   5,595                 5,595
                                                                            OTHER TRADE SHOW
   6010    1004355   03/06/2006   05/01/2006    MCKESSON CORPORATION        EXPENSES                   4,500                 4,500
                                              INTEGRATED COMMERCIALIZATION  BROCHURE
   6700    993345                                    SOLUTIONS              PRODUCTION/REPRINTS        1,000                 1,000
                                                                                                     ---------- -------- ----------





                                       59






                                  SCHEDULE 2.6

                                    ROYALTIES

Purchaser shall pay Seller the Royalties contemplated in this SCHEDULE 2.6
during the Royalty Term (collectively, the "ROYALTIES") and the Parties agree to
the following terms and conditions relating to such Royalty Payments as follows:

1.      INITIAL ROYALTY PERIOD. During the Royalty Term, Purchaser shall pay
Seller a Fifteen Percent (15%) royalty on Net Sales of Products sold by
Purchaser during the time period beginning on the later of (i) the Closing Date
and (ii) January 1, 2007, and ending on the twenty (20)-month anniversary of
such date (the "INITIAL ROYALTY PERIOD"). During the Initial Royalty Period,
Royalties due hereunder shall be paid quarterly within forty-five (45) days of
the end of each calendar quarter.

2.      SUBSEQUENT ROYALTY PERIOD. After the Initial Royalty Period, during the
remainder of the Royalty Term Purchaser shall pay Seller a royalty on annual Net
Sales of Products within forty-five (45) days of the end of each calendar year
as follows:



------------------------------------------------------------- ------------------------------------------------------
                                                          
ANNUAL NET SALES OF PRODUCTS                                  ROYALTY RATE
------------------------------------------------------------- ------------------------------------------------------
If annual Net Sales of Products are $200 million or less      5% of such Net Sales
------------------------------------------------------------- ------------------------------------------------------
If annual Net Sales of Products exceed $200 million but do    10% of all Net Sales
not exceed $250 million
------------------------------------------------------------- ------------------------------------------------------
If annual Net Sales of Products exceed $250 million           10% of Net Sales on all Net Sales from dollar one
                                                              ($1) to $250 million, plus 15% of Net Sales in
                                                              excess of $250 million
------------------------------------------------------------- ------------------------------------------------------


For example, after the Initial Royalty Period if Purchaser achieves annual Net
Sales of Products of $300 million, Purchaser shall pay Seller a royalty as
follows: 10% x $250 million = $25 million; 15% x $50 million= $7.5 million; for
a total of $32.5 million.

         3. "NET SALES" means the gross amount received by Purchaser or its
         Affiliates or sublicensees, from third parties for sale of the Products
         in the Territory, less, to the extent deducted from such amount or on
         such invoice consistent with GAAP, the following items: (a) quantity,
         trade or cash discounts, chargebacks, returns, allowances, rebates
         (including any and all federal, state or local government rebates, such
         as Medicaid rebates) and price adjustments, and amounts paid pursuant
         to inventory management arrangements; (b) sales and other excise taxes
         and duties or similar governmental charges levied upon the production,
         transportation, importation, delivery, use or sale of such Product; (c)
         amounts actually refunded due to rejected, spoiled, damaged, outdated
         or returned Product; and (d) freight, shipment and insurance costs. If
         any Products are sold to third parties in transactions that are not at
         arm's length between the buyer and seller, or for consideration other
         than cash, then the gross amount to be included in the calculation of
         Net Sales for such sales shall be the amount that would have been
         invoiced had the





         transaction been conducted at arm's length, which amount shall be
         determined, whenever possible, by reference to the average selling
         price of the relevant Product in arm's-length transactions in
         the country of sale at the time of sale. Net Sales shall not
         include amounts invoiced for the supply, disposal of Product
         for, or use of Product, in clinical or pre-clinical trials or as free
         samples (such samples to be in quantities common in the industry for
         this sort of Product).

4.       ROYALTY PAYMENTS.

         (a) Each Royalty payment shall be accompanied by a statement of the
amount of gross sales during the applicable time period represented by such
Royalty payment (together with appropriate documentation in support thereof),
the calculation of Net Sales during the applicable payment time period and the
amount of royalties due on such Net Sales.

         (b) The obligation to pay royalties to Seller is imposed only once with
respect to each Net Sale. In calculating the above royalty due with respect to
Net Sales during any period of less than a calendar year, the foregoing
thresholds for a calendar year Net Sales shall be pro-rated in accordance with
the duration of such period. Purchaser shall be entitled to a credit against
royalties once with respect to any particular sale. There shall be no obligation
to pay royalties to Seller on sales to, between or among Purchaser,
sublicensees, distributors or their respective Affiliates, but in such instances
the obligation to pay royalties shall arise upon the sale by Purchaser,
sublicensees, distributors or their respective Affiliates to other third
parties.

5.      MODE OF PAYMENT. All statements submitted by Purchaser to Seller
pursuant to SECTION 4(A) shall be stated in U.S. Dollars. All Royalties to be
made by Purchaser to Seller under this Agreement shall be made in U.S Dollars
and shall be paid by bank wire transfer in immediately available funds to such
bank account as may be designated in writing by Seller or Purchaser,
respectively, from time to time.

6.      RECORDS RETENTION. For purposes of this Agreement, Purchaser shall keep
complete and accurate records pertaining to all sales of Products in the
Territory and covering all transactions from which Net Sales under this
Agreement are derived for a period of three (3) calendar years after the year in
which such sales occurred, and in sufficient detail to permit Seller to confirm
the accuracy of Royalties due hereunder.

7.      AUDIT REQUEST. At the request and expense (except as provided below) of
Seller, Purchaser shall each permit an independent, certified public accountant
appointed by Seller and reasonably acceptable to Purchaser, at reasonable
intervals and times and upon reasonable notice (but no more than once in any
12-month period unless Seller is required to do in order to comply with
applicable Law), to examine Purchaser's records regarding Net Sales of Products
under this Agreement. The accounting firm shall disclose to Seller only whether
the royalty reports are correct or incorrect and the amount of any discrepancy.
No other information shall be provided to Seller. In the event that such
inspection shall indicate that in any calendar year the royalties which should
have been paid by Purchaser are at least ten percent (10%) greater than those
which were actually paid by Purchaser, then Purchaser shall pay the cost of such
inspection. Seller shall treat all such financial information in accordance with
the confidentiality and non-




use provisions of this Agreement, and shall cause its accounting firm to
enter into a reasonably acceptable confidentiality agreement with Purchaser,
obligating it to retain all such information in confidence pursuant to such
confidentiality agreement on terms no less stringent than as provided herein.

8.      TAXES. If Laws require withholding of income taxes or other taxes
imposed upon Royalties set forth herein, Purchaser shall make such withholding
payments as may be required and shall subtract such withholding payments from
the Royalties due hereunder. Purchaser shall submit appropriate proof of
payment of the withholding taxes to Seller within a reasonable period of time.





                                 SCHEDULE 2.8(B)

                           INVENTORY VALUE ADJUSTMENTS

(I) "WHOLESALE TARGET" means achievement by Seller of levels of wholesale
Inventory of Product of 1 month or less, based on WHOLESALE CHANNEL INVENTORY
MONTHS ON HAND.

(II) "RETAIL TARGET" means achievement by Seller of $22,500,000 in RETAIL
INVENTORY VALUE.

(III) "WHOLESALE CHANNEL INVENTORY MONTHS ON HAND" is calculated as follows:

         WHOLESALE INVENTORY VALUE divided by [AVERAGE WEEKLY SALES
         VALUE times 4.33]


(IV) "EXCESS WHOLESALE INVENTORY VALUE" is calculated as follows:

         Any positive number obtained by the product of $10,000,000 times
         [WHOLESALE CHANNEL INVENTORY MONTHS ON HAND minus 1]


(V) "RETAIL INVENTORY VALUE DIFFERENCE" is calculated as follows:

         ANY POSITIVE NUMBER OBTAINED BY THE DIFFERENCE OF RETAIL INVENTORY
         VALUE minus $22,500,000.


(VI) "WHOLESALE INVENTORY VALUE" is measured as follows:

         the aggregation of ending inventory per SKU (in pills or equivalent
         unit of measure), as reported on the Closing Date by the Designated
         Wholesale Customers on their 852 report - field QA, multiplied by the
         PRICE PER PILL OR EQUIVALENT UNIT.


(VII) "RETAIL INVENTORY VALUE" is measured as follows:

         the aggregate amount of inventory stocking per SKU (in pills or
         equivalent unit of measure), as reported in the PRODUCT RETAIL DEMAND,
         INVENTORY & APROV STUDY PREPARED BY IMS for Seller on the Closing Date
         multiplied by the respective PRICE PER PILL OR EQUIVALENT UNIT.


(VIII) "AVERAGE WEEKLY SALES VALUE" is calculated as follows:

         the aggregate of pills (or equivalent units of measure) shipped by all
         wholesalers of Product, by SKU, for the past 13 week period up through
         Closing Date, as reported by the Designated Wholesale Customers on
         their 867 report - field QS, multiplied by the respective PRICE PER
         PILL OR EQUIVALENT UNIT; resulting product will be divided by 13.


(IX) "PRICE PER PILL OR EQUIVALENT UNIT" is measured as follows:

         WAC Price per pill or equivalent unit (on a SKU basis).


(X)      "DESIGNATED WHOLESALE CUSTOMERS" means those wholesale customers of
         Seller with which Seller has distribution sales "DSA" contracts as well
         as those to whom Seller has sold more than $25,000 of Product in 2006.



________________________________________________________________________________




                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                                 ---------------

                                    FORM 8-K

                                 CURRENT REPORT


     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

       Date of Report (Date of earliest event reported): September 7, 2006

                       LIGAND PHARMACEUTICALS INCORPORATED
             (Exact name of registrant as specified in its charter)

                                    DELAWARE
                 (State or other jurisdiction of incorporation)

                                    000-20720
                            (Commission File Number)

                           10275 SCIENCE CENTER DRIVE,
                              SAN DIEGO, CALIFORNIA
                    (Address of principal executive offices)

                                 (858) 550-7500
              (Registrant's telephone number, including area code)

                                   77-0160744
                      (I.R.S. Employer Identification No.)

                                   92121-1117
                                   (Zip Code)

                                 _______________



Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under
any of the following provisions (see General Instruction A.2. below):

|_| Written communications pursuant to Rule 425 under the Securities Act (17 CFR
    230.425)
|_| Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
    240.14a-12)
|_| Pre-commencement communications pursuant to Rule 14d-2(b) under
    the Exchange Act (17 CFR 240.14d-2(b))
|_| Pre-commencement communications pursuant to Rule 13e-4(c) under the
    Exchange Act (17 CFR 240.13e-4(c))


________________________________________________________________________________




ITEM 1.01.  ENTRY INTO A MATERIAL DEFINITIVE AGREEMENT.

              On September 7, 2006, Ligand Pharmaceuticals Incorporated, a
Delaware corporation (the "LIGAND"), Seragen, Inc., a Delaware corporation and
wholly-owned subsidiary of Ligand (together with Ligand, the "Company"), Eisai
Inc., a Delaware corporation ("EISAI INC.") and Eisai Co., Ltd., a Japanese
company (together with Eisai Inc., "EISAI"), entered into a Purchase Agreement
(the "PURCHASE AGREEMENT") pursuant to which Eisai has agreed to acquire all of
the Company's worldwide rights in and to the Company's oncology product line
(the "PRODUCT LINE"), including, among other things, all related inventory,
equipment, records and intellectual property, and assume certain liabilities as
set forth in the Purchase Agreement (collectively, the "Transaction"). The
Product Line includes the Company's four marketed oncology drugs: ONTAK,
Targretin capsules, Targretin gel and Panretin gel. In addition, Eisai has
agreed to offer employment following the closing of the Transaction (the
"CLOSING") to certain of the Company's existing employees that support the sale
of the Product Line, subject to certain terms and conditions.

              Pursuant to the Purchase Agreement, at Closing, the Company will
be paid a $205 million cash payment (the "CLOSING PAYMENT"), $20 million of
which will be funded into an escrow account to support any indemnification
claims made by Eisai following the Closing, and Eisai will assume certain
liabilities. The Closing Payment is subject to adjustment in accordance with the
terms of the Purchase Agreement if the value of the Product Line inventory at
Closing is less than a pre-determined target value.

              The Purchase Agreement may be terminated by either Eisai or the
Company if the Closing has not occurred by December 31, 2006, or upon the
occurrence of certain customary matters. In addition, if the Purchase Agreement
is terminated under certain circumstances, including a determination by the
Company's board of directors to accept an acquisition proposal it deems superior
to the Transaction, the Company has agreed to pay Eisai a termination fee of
$7.5 million. The Closing is subject to certain customary closing conditions,
including, but not limited to, the expiration of the waiting period under the
Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended.

              The foregoing description of the Purchase Agreement does not
purport to be complete and is qualified in its entirety by reference to such
agreement. The Purchase Agreement is filed as Exhibit 2.1 hereto and is
incorporated herein by reference.

ITEM 9.01.   FINANCIAL STATEMENTS AND EXHIBITS.

(d)      Exhibits

EXHIBIT NUMBER        DESCRIPTION
--------------        --------------------

2.1                   Purchase Agreement, by and among Ligand Pharmaceuticals
                      Incorporated, Seragen, Inc., Eisai Inc. and Eisai Co.,
                      Ltd., dated as of September 7, 2006*

* Schedules to the Purchase Agreement are not material and have been omitted in
reliance on Item 601(b)(2) of Regulation S-K. The Company agrees to furnish
supplementally a copy of any omitted schedule to the Securities and Exchange
Commission upon request.



                                   SIGNATURES

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                                 LIGAND PHARMACEUTICALS INCORPORATED



    Date : September 11, 2006    By:     /S/ WARNER R. BROADDUS
                                        ----------------------
                                 Name:   Warner R. Broaddus
                                 Title:  Vice President, General Counsel &
                                         Secretary





                                  EXHIBIT INDEX



EXHIBIT NUMBER       DESCRIPTION
------------------   --------------------

2.1                  Purchase Agreement, by and among Ligand Pharmaceuticals
                     Incorporated, Seragen, Inc., Eisai Inc. and Eisai Co.,
                     Ltd., dated as of September 7, 2006*

* Schedules to the Purchase Agreement are not material and have been omitted in
reliance on Item 601(b)(2) of Regulation S-K. The Company agrees to furnish
supplementally a copy of any omitted schedule to the Securities and Exchange
Commission upon request.


                                                                     EXHIBIT 2.1







                               PURCHASE AGREEMENT



                                  by and among



                       LIGAND PHARMACEUTICALS INCORPORATED

                                  SERAGEN, INC.

                                   EISAI INC.

                                       and

                                 EISAI CO., LTD.



                          Dated as of September 7, 2006








                                TABLE OF CONTENTS



ARTICLE I. DEFINITIONS........................................................1

         SECTION 1.1       DEFINITIONS........................................1
         SECTION 1.2       OTHER DEFINITIONAL PROVISIONS.....................16

ARTICLE II. PURCHASE AND SALE................................................17

         SECTION 2.1       TRANSFER OF PURCHASED ASSETS AND INVENTORY........17
         SECTION 2.2       EXCLUDED ASSETS...................................19
         SECTION 2.3       ASSUMED LIABILITIES...............................19
         SECTION 2.4       EXCLUDED LIABILITIES..............................19
         SECTION 2.5       PROCEDURES FOR CERTAIN PURCHASED ASSETS NOT FREELY
                           TRANSFERABLE......................................19
         SECTION 2.6       PURCHASE PRICE....................................20
         SECTION 2.7       PURCHASE PRICE ALLOCATION.........................21
         SECTION 2.8       CLOSING DATE INVENTORY ADJUSTMENTS................21
         SECTION 2.9       RISK OF LOSS......................................23
         SECTION 2.10      TAX WITHHOLDING...................................23

ARTICLE III. CLOSING.........................................................23

         SECTION 3.1       CLOSING...........................................23
         SECTION 3.2       TRANSACTIONS AT CLOSING...........................24
         SECTION 3.3       PURCHASER'S ACTIONS AND DELIVERIES................25

ARTICLE IV. REPRESENTATIONS AND WARRANTIES OF SELLER AND SELLER SUB..........26

         SECTION 4.1       ORGANIZATION......................................26
         SECTION 4.2       DUE AUTHORIZATION.................................27
         SECTION 4.3       NO CONFLICTS; ENFORCEABILITY......................27
         SECTION 4.4       TITLE; ASSETS.....................................27
         SECTION 4.5       INVENTORY.........................................28
         SECTION 4.6       APPLICABLE PERMITS................................28
         SECTION 4.7       INTELLECTUAL PROPERTY.............................29
         SECTION 4.8       LITIGATION........................................31
         SECTION 4.9       ASSIGNED CONTRACTS................................31
         SECTION 4.10      CONSENTS..........................................33
         SECTION 4.11      TAXES.............................................33
         SECTION 4.12      EMPLOYEE MATTERS..................................33
         SECTION 4.13      LABOR MATTERS.....................................34
         SECTION 4.14      COMPLIANCE WITH LAW...............................35
         SECTION 4.15      REGULATORY MATTERS................................35
         SECTION 4.16      GOVERNMENT MULTI-PRODUCT CONTRACTS................37
         SECTION 4.17      FINANCIAL STATEMENTS; NO UNDISCLOSED LIABILITIES..37

                                       i



         SECTION 4.18      ABSENCE OF CHANGES................................37
         SECTION 4.19      INSURANCE.........................................38
         SECTION 4.20      BROKERS, ETC......................................38
         SECTION 4.21      PRODUCT EQUIPMENT.................................38
         SECTION 4.22      PROMOTIONAL MATERIALS.............................38
         SECTION 4.23      NO OTHER WARRANTIES...............................39

ARTICLE V. REPRESENTATIONS AND WARRANTIES OF EISAI INC. AND EISAI, LTD.......39

         SECTION 5.1       ORGANIZATION......................................39
         SECTION 5.2       DUE AUTHORIZATION.................................39
         SECTION 5.3       NO CONFLICTS; ENFORCEABILITY......................39
         SECTION 5.4       LITIGATION........................................40
         SECTION 5.5       CONSENTS..........................................40
         SECTION 5.6       FINANCING.........................................40
         SECTION 5.7       BROKERS, ETC......................................40
         SECTION 5.8       INDEPENDENT INVESTIGATION.........................40
         SECTION 5.9       NO OTHER WARRANTIES...............................41

ARTICLE VI. COVENANTS PRIOR TO CLOSING.......................................41

         SECTION 6.1       ACCESS TO INFORMATION.............................41
         SECTION 6.2       CONDUCT OF THE PRODUCT LINE BUSINESS..............41
         SECTION 6.3       REQUIRED APPROVALS AND CONSENTS...................43
         SECTION 6.4       HSR ACT...........................................43
         SECTION 6.5       NO NEGOTIATION....................................44
         SECTION 6.6       TRANSITION ACTIVITIES.............................45
         SECTION 6.7       NON-SOLICITATION; NON-COMPETITION; NON-
                           DISPARAGEMENT.....................................46
         SECTION 6.8       NOTIFICATIONS.....................................47
         SECTION 6.9       DISCLOSURE SUPPLEMENTS............................48
         SECTION 6.10      FURTHER ASSURANCES; FURTHER DOCUMENTS.............48

ARTICLE VII. CONDITIONS TO CLOSING...........................................48

         SECTION 7.1       CONDITIONS PRECEDENT TO OBLIGATIONS OF SELLER,
                           SELLER SUB AND PURCHASER..........................48
         SECTION 7.2       CONDITIONS PRECEDENT TO PURCHASER'S OBLIGATIONS...49
         SECTION 7.3       CONDITIONS PRECEDENT TO SELLER'S AND SELLER
                           SUB'S OBLIGATIONS.................................50

ARTICLE VIII. ADDITIONAL COVENANTS...........................................51

         SECTION 8.1       CONFIDENTIALITY; PUBLICITY........................51
         SECTION 8.2       AVAILABILITY OF RECORDS...........................51
         SECTION 8.3       USE OF SELLER BRANDS..............................52
         SECTION 8.4       NOTIFICATION OF CUSTOMERS.........................52
         SECTION 8.5       PRODUCT RETURNS, REBATES AND CHARGEBACKS..........53
         SECTION 8.6       ACCOUNTS RECEIVABLE...............................56

                                       ii



         SECTION 8.7       REGULATORY MATTERS................................56
         SECTION 8.8       WEBSITE INFORMATION...............................59
         SECTION 8.9       TAX MATTERS.......................................59
         SECTION 8.10      GOVERNMENT MULTI-PRODUCT CONTRACTS................60
         SECTION 8.11      INVENTORY MATTERS.................................61
         SECTION 8.12      PROSECUTION OF PRODUCT MARKS......................61
         SECTION 8.13      TRADE SECRETS.....................................61
         SECTION 8.14      PROFESSIONAL ADVISORY FEES, ETC...................62
         SECTION 8.15      NON-ASSERTION COVENANT............................62

ARTICLE IX. EMPLOYEE MATTERS.................................................62

         SECTION 9.1       EMPLOYEE TRANSFER.................................62
         SECTION 9.2       TRANSITION OF BENEFITS............................63
         SECTION 9.3       WARN ACT..........................................65
         SECTION 9.4       EMPLOYEE INFORMATION..............................65

ARTICLE X. TERM AND TERMINATION..............................................66

         SECTION 10.1      TERMINATION.......................................66
         SECTION 10.2      PROCEDURE AND EFFECT OF TERMINATION...............67

ARTICLE XI. INDEMNIFICATION..................................................69

         SECTION 11.1      SURVIVAL OF REPRESENTATIONS AND WARRANTIES;
                           EXPIRATION........................................69
         SECTION 11.2      INDEMNIFICATION BY SELLER AND SELLER SUB..........70
         SECTION 11.3      INDEMNIFICATION BY PURCHASER......................71
         SECTION 11.4      CERTAIN PROCEDURES FOR INDEMNIFICATION............71
         SECTION 11.5      LIMITATIONS.......................................73
         SECTION 11.6      ESCROW............................................74
         SECTION 11.7      SATISFACTION OF CLAIMS............................74
         SECTION 11.8      EXCLUSIVE REMEDY..................................75

ARTICLE XII. MISCELLANEOUS...................................................75

         SECTION 12.1      ASSIGNMENT; BINDING EFFECT........................75
         SECTION 12.2      CUMULATIVE RIGHTS.................................75
         SECTION 12.3      EXPENSES..........................................75
         SECTION 12.4      NOTICES...........................................75
         SECTION 12.5      ENFORCEABILITY; SEVERABILITY......................76
         SECTION 12.6      AMENDMENT; ENTIRE AGREEMENT.......................77
         SECTION 12.7      NO THIRD PARTY BENEFICIARIES......................77
         SECTION 12.8      WAIVER............................................77
         SECTION 12.9      GOVERNING LAW; JURISDICTION.......................77
         SECTION 12.10     INJUNCTIVE RELIEF.................................78
         SECTION 12.11     WAIVER OF JURY TRIAL..............................78
         SECTION 12.12     HEADINGS..........................................78
         SECTION 12.13     COUNTERPARTS......................................78

                                      iii



         SECTION 12.14     SCHEDULES.........................................78
         SECTION 12.15     CONSTRUCTION......................................78


                                       iv


                                LIST OF EXHIBITS


Exhibit A-1           -      Assignment of U.S. Product Marks
Exhibit A-2           -      Assignment of Non-U.S. Product Marks
Exhibit B-1           -      Assignment of Product Patent Rights
Exhibit B-2           -      Assignment of Non-U.S. Product Patent Rights
Exhibit C-1           -      Bill of Sale and Assignment and Assumption
                             Agreement - U.S.
Exhibit C-2           -      Bill of Sale and Assignment and Assumption
                             Agreement - Non-U.S.
Exhibit D             -      Escrow Agreement
Exhibit E             -      ONTAK Manufacture and Supply Agreement Assignment
Exhibit F             -      ONTAK Product Insert
Exhibit G             -      Targretin Manufacture and Supply Agreement
                             Assignment
Exhibit H             -      Transition Services Agreement


                                LIST OF SCHEDULES


Schedule 2.3           -      Assumed Liabilities
Schedule 2.8           -      Inventory Value Calculation
Schedule 6.2           -      Conduct of Product Line Business
Schedule 8.5(c)        -      Best Price and AMP
Schedule 9.1(a)(i)     -      Product Employees to whom Purchaser will Extend
                              Employment Offers
Schedule 9.1(a)(ii)    -      Potential Employees
Schedule 9.2(e)        -      Qualified Beneficiaries


                           SELLER DISCLOSURE SCHEDULE


Schedule 1.1(a)        -      Applicable Permits
Schedule 1.1(b)        -      Assigned Contracts
Schedule 1.1(c)        -      Knowledge
Schedule 1.1(d)        -      ONTAK Patents
Schedule 1.1(e)        -      Panretin Patents
Schedule 1.1(f)        -      Permitted Encumbrances
Schedule 1.1(g)        -      Product Copyrights
Schedule 1.1(h)        -      Product Equipment
Schedule 1.1(i)        -      Product Marks
Schedule 1.1(j)        -      Product Trade Dress
Schedule 1.1(k)        -      Promotional Materials

                                       v



Schedule 1.1(l)        -      Targretin Patents
Schedule 4.3           -      No Conflicts
Schedule 4.4           -      Title; Assets
Schedule 4.5(c)        -      Inventory Sales Not in Ordinary Course of Business
Schedule 4.7(b)        -      Enforceable and Valid Intellectual Property
Schedule 4.7(c)        -      Control of Intellectual Property
Schedule 4.7(d)        -      Royalty Obligations
Schedule 4.7(e)        -      Licenses or Other Rights Granted under
                              Intellectual Property
Schedule 4.7(f)        -      Intellectual Property Infringement
Schedule 4.8           -      Litigation
Schedule 4.9           -      Assigned Contracts - Third Party Consents
Schedule 4.10          -      Consents
Schedule 4.12(a)       -      Product Employee List
Schedule 4.12(b)       -      Seller Plans
Schedule 4.12(g)       -      No Liabilities to Product Employees
Schedule 4.13          -      Labor Matters
Schedule 4.14          -      Compliance with Law
Schedule 4.15          -      Registrations
Schedule 4.18          -      Absence of Changes
Schedule 4.19          -      Insurance Policies
Schedule 7.2           -      Required Consents

                                       vi





                               PURCHASE AGREEMENT

THIS PURCHASE AGREEMENT (this "AGREEMENT"), dated as of September 7, 2006
(the "EXECUTION DATE"), is entered into by and among Ligand Pharmaceuticals
Incorporated, a Delaware corporation ("SELLER"), Seragen, Inc.,
a Delaware corporation and wholly-owned subsidiary of Seller ("SELLER SUB"), and
Eisai Inc., a Delaware corporation ("EISAI INC.") and Eisai Co., Ltd., a
Japanese company ("EISAI, LTD.", and together with Eisai Inc.,"PURCHASER"). Each
of Seller, Seller Sub, Eisai Inc. and Eisai, Ltd. is sometimes referred to
herein, individually, as a "PARTY" and, collectively, as the "PARTIES." All
capitalized terms used herein shall have the meanings specified in ARTICLE I
below or elsewhere in this Agreement, as applicable.

                                  INTRODUCTION

         WHEREAS, subject to the terms and conditions of this Agreement, Seller
and Seller Sub desire to transfer their respective rights in the Products and
substantially all of their respective rights in the Distribution of the Products
in the Territory (collectively, the "PRODUCT LINE BUSINESS") to Purchaser;

         WHEREAS, subject to the terms and conditions of this Agreement, Seller
and Seller Sub wish to sell the Purchased Assets and Inventory and transfer the
Assumed Liabilities to Purchaser, and Purchaser wishes to purchase the Purchased
Assets and Inventory and assume the Assumed Liabilities from Seller and Seller
Sub; and

         WHEREAS, the Parties agree that all United States rights, liabilities
and obligations to the Purchased Assets, Inventory and Assumed Liabilities
assigned, transferred and conveyed pursuant to this Agreement shall be assigned,
transferred and conveyed to Eisai Inc., and that all other rights, liabilities
and obligations to the Purchased Assets, Inventory and Assumed Liabilities shall
be assigned, transferred and conveyed to Eisai, Ltd.;

         NOW, THEREFORE, in consideration of the foregoing and the
representations, warranties, covenants, agreements and provisions set forth
herein and in the Other Agreements, and for other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, and
intending to be legally bound hereby, the Parties agree as follows:

                                   ARTICLE I.
                                   DEFINITIONS

        Section 1.1   DEFINITIONS. In addition to the terms defined above and
other terms defined in other Sections of this Agreement, the following terms
shall have the meanings set forth below for purposes of this Agreement:

         "ACCOUNTANTS" means an accounting firm of national reputation
(excluding each of Seller's and Purchaser's respective regular outside
accounting firms) as may be mutually acceptable to Seller and Purchaser;
PROVIDED, HOWEVER, if Seller and Purchaser are unable to agree on such
accounting firm within ten (10) days or any such mutually selected accounting
firm is unwilling or unable to serve, then Seller shall deliver to Purchaser a
list of three (3) other accounting firms of national reputation which have not
performed services for Seller or




Purchaser in the preceding three (3)-year period, and Purchaser shall select
one of such three (3) accounting firms.

         "ACCOUNTS RECEIVABLE" means any rights whatsoever to any accounts
receivable (including any payments received with respect thereto on or after the
Closing, unpaid interest accrued on any such accounts receivable and any
security or collateral related thereto) arising from sales of the Products on or
prior to the Closing Date.

         "ACQUISITION PROPOSAL" means a proposal from a third party not
solicited by or on behalf of Seller, Seller Sub or any of their respective
Affiliates or any Representatives of the foregoing between the Execution Date
and the Effective Time relating to the acquisition of the Products and the
Product Line Business, or the acquisition of more than fifty percent (50%) of
Seller's Common Stock.

         "ACT" means the United States Federal Food, Drug, and Cosmetic Act, as
amended, and the rules, regulations, guidelines, guidances and requirements
promulgated thereunder, as may be in effect from time to time.

         "ACTION" means any claim, action, suit, arbitration, inquiry, audit,
proceeding or investigation by or before or otherwise involving, any
Governmental Authority.

         "AFFILIATE" means, with respect to any Person, any other Person
directly or indirectly controlling or controlled by, or under direct or indirect
common control with, such Person. For purposes of this definition, a Person
shall be deemed, in any event, to control another Person if it owns or controls,
directly or indirectly, or has the ability to direct or cause the direction or
control of, more than fifty percent (50%) of the voting equity of the other
Person.

         "AGREEMENT" has the meaning set forth in the first paragraph of this
Agreement.

         "ALTERNATIVE TRANSACTION" has the meaning set forth in SECTION 10.2(F).

         "ALTERNATIVE TRANSACTION NOTICE" has the meaning set forth in SECTION
10.2(F).

         "AMP" has the meaning set forth in SECTION 8.5(C)(III).

         "APPLICABLE PERMITS" means the permits, approvals, licenses, franchises
or authorizations, including the Registrations, from any Governmental Authority
held by Seller, Seller Sub or their respective Affiliates that relate primarily
or exclusively to any Product or the Product Line Business, as set forth on
SCHEDULE 1.1(A) of the Seller Disclosure Schedule, in each case, together with
any renewals, extensions or modifications thereof or any amendments thereto.

         "APPORTIONED OBLIGATIONS" has the meaning set forth in SECTION 8.9(B).

         "ASSETS" of any Person means all assets and properties of any kind,
nature, character and description (whether real, personal or mixed, whether
tangible or intangible, whether absolute, accrued, contingent, fixed or
otherwise and wherever situated), including the goodwill related thereto,
operated, owned or leased by such Person, including cash, cash equivalents,
accounts


                                       2


and notes receivable, chattel paper, documents, instruments, general
intangibles, equipment, inventory, goods and intellectual property.

         "ASSIGNED CONTRACT(S)" means those Contracts, regardless of dollar
value, including purchase orders, related primarily or exclusively to any
Product or the Product Line Business, as set forth on SCHEDULE 1.1(B) of the
Seller Disclosure Schedule (such schedule to be updated by Seller immediately
prior to the Closing) together with those Contracts which would have been set
forth on SCHEDULE 1.1(B) of the Seller Disclosure Schedule but for the dollar
thresholds of SECTION 4.9(A)(II). Notwithstanding the foregoing, "ASSIGNED
CONTRACT(S)" shall not include any Seller Plan.

         "ASSIGNMENT OF NON-U.S. PRODUCT MARKS" means an Assignment of Non-U.S.
Product Marks, in substantially the form attached hereto as EXHIBIT A-2.

         "ASSIGNMENT OF NON-U.S. PRODUCT PATENT RIGHTS" means an Assignment of
Non-U.S. Product Patent Rights, in substantially the form attached hereto as
EXHIBIT B-2.

         "ASSIGNMENT OF U.S. PRODUCT MARKS" means an Assignment of Non-U.S.
Product Marks, in substantially the form attached hereto as EXHIBIT A-1.

         "ASSIGNMENT OF U.S. PRODUCT PATENT RIGHTS" means an Assignment of
Non-U.S. Product Patent Rights, in substantially the form attached hereto as
EXHIBIT B-1.

         "ASSUMED LIABILITIES" has the meaning set forth in SECTION 2.3.

         "BAYH-DOLE ACT" means the Patent and Trademark Law Amendments Act, 35
U.S.C. ss.200 ET. SEQ, as may be amended or succeeded from time to time, and the
rules, regulations, guidelines, guidances and requirements promulgated
thereunder, as may be in effect from time to time.

         "BEST PRICE" has the meaning set forth in SECTION 8.5(C)(III).

         "BILL OF SALE AND ASSIGNMENT AND ASSUMPTION AGREEMENT - NON-U.S." means
a Bill of Sale and Assignment and Assumption Agreement - Non-U.S., in
substantially the form attached hereto as EXHIBIT C-2.

         "BILL OF SALE AND ASSIGNMENT AND ASSUMPTION AGREEMENT - U.S." means a
Bill of Sale and Assignment and Assumption Agreement - U.S., in substantially
the form attached hereto as EXHIBIT C-1.

         "BLA(S)" means a Biologics License Application, or equivalent FDA
application, for any product, as appropriate, relating to the manufacturing and
marketing of biologically based pharmaceutical products, and all supplements or
amendments filed pursuant to the requirements of the Act, including all
documents, data and other information concerning the product which are
reasonably necessary for the FDA approval in the United States.


                                       3


         "BUSINESS DAY" means any day other than a Saturday, a Sunday or a day
on which banks in New York, New York, United States of America are authorized or
obligated by Law to be closed.

         "CAP" has the meaning set forth in SECTION 11.5(B).

         "CHARGEBACK CLAIMS" has the meaning set forth in SECTION 8.5(E)(I).

         "SELLER SUB" has the meaning set forth in the first paragraph of this
Agreement.

         "CLAIM NOTICE" has the meaning set forth in SECTION 11.1(D).

         "CLOSING" means the closing of the purchase and sale of the Purchased
Assets and Inventory, and assignment and assumption of the Assumed Liabilities
contemplated by this Agreement.

         "CLOSING DATE" has the meaning set forth in SECTION 3.1.

         "CLOSING DATE INVENTORY STATEMENT" has the meaning set forth in SECTION
2.8(A).

         "CLOSING DATE INVENTORY VALUE" has the meaning set forth in SECTION
2.8(A).

         "CODE" means the United States Internal Revenue Code of 1986, as
amended.

         "CONFIDENTIALITY AGREEMENT" means that certain Confidentiality
Agreement, dated as of December 19, 2005, between Eisai Inc. and UBS Securities
LLC, on behalf of Seller.

         "CONTRACTS" means any and all legally binding written commitments,
contracts, purchase orders, leases, licenses, easements, permits, instruments,
commitments, arrangements, undertakings, practices or other agreements.

         "CONTROL" means, with respect to any Intellectual Property, possession
by a Party of the right, whether directly or indirectly, and whether by
ownership, license or otherwise, to assign, grant the right to use, or grant a
license, sublicense or other right to or under, such Intellectual Property as
provided for herein without violating the terms of any agreement or other
arrangement with any third party.

         "COPYRIGHTS" means (a) all copyrights (including copyrights in any
package inserts, marketing or promotional materials, Labeling or other text
provided to prescribers or consumers), whether registered or unregistered
throughout the world; (b) any registrations and applications therefor; (c) all
related rights and priorities afforded under any international treaty,
convention, or the like; (d) all extensions and renewals thereof; and (e) the
right to sue for past, present and future infringements of any of the foregoing,
and all proceeds of the foregoing, including licenses, royalties, income,
payments, claims, damages (including attorneys' fees), and proceeds of suit.

         "DATA ROOMS" means, collectively, the electronic datasite operated by
the Merrill Corporation on behalf of Seller in connection with the Transactions,
the data room established in

                                       4


San Diego, California and made accessible to Purchaser and the data room
established in New York City, New York and made accessible to Purchaser.

         "DEDUCTIBLE" has the meaning set forth in SECTION 11.5(A).

         "DISTRIBUTION" means any and all activities related to the
distribution, marketing, promoting, offering for sale and selling of any
Product, including advertising, detailing, educating, planning, promoting,
conducting, reporting, storing, handling, shipping and communicating with
Governmental Authorities and third parties in connection therewith.

         "EFFECTIVE TIME" has the meaning set forth in SECTION 3.1.

         "EMEA" means the European Agency for the Evaluation of Medicinal
Products, or any successor agency thereto.

         "ENCUMBRANCE" means, with respect to the property or right of Seller,
Seller Sub or any of their respective Affiliates, any security interest, pledge,
hypothecation, mortgage, lien (statutory or otherwise), assessment, levy, claim
known to Seller, charge, community property interest, equitable interest, third
party license, conditional sale or title retention agreement, option, right of
first option, right of first refusal or similar restriction, restriction on
transfer, restriction on income, or any material restriction on any attribute of
ownership or use of such property or right as it was owned and/or used by
Seller, Seller Sub or any of their respective Affiliates.

         "ERISA" means the United States Employee Retirement Income Security Act
of 1974, as amended, or any successor law, and regulations and rules issued
pursuant to that Act or any successor law.

         "ERISA AFFILIATE" of any entity means any other entity (whether or not
incorporated) that, together with such entity, would be treated as a single
employer under Section 414 of the Code or Section 4001 of ERISA.

         "ESCROW ACCOUNT" has the meaning set forth in SECTION 2.6.

         "ESCROW AGENT" means Wells Fargo Bank, National Association or another
escrow agent to be mutually agreed upon by the Parties.

         "ESCROW AGREEMENT" means the Escrow Agreement to be entered into by and
among the Escrow Agent, Seller and Purchaser, in substantially the form attached
hereto as EXHIBIT D.

         "ESCROW AMOUNT" has the meaning set forth in SECTION 2.6.

         "EXCHANGE" means the NASDAQ Global Market.

         "EXCHANGE ACT" means the United States Securities Exchange Act of 1934,
as amended, and the rules, regulations and SEC guidance promulgated thereunder,
as may be in effect from time to time.

                                       5


         "EXCLUDED ASSETS" has the meaning set forth in SECTION 2.2.

         "EXCLUDED INTELLECTUAL PROPERTY" means all right, title and interest of
Seller, Seller Sub or any of their respective Affiliates in and to Intellectual
Property, whether now existing or hereafter developed or acquired (including the
Seller Brands) other than the Product Intellectual Property.

         "EXCLUDED LIABILITIES" has the meaning set forth in SECTION 2.4.

         "EXCLUSIVITY PERIOD" means, with respect to a Product in a country, the
period commencing on the date of the first commercial sale of such Product in
such country until the later of the date of (a) the expiration of the last
Patent that includes a Valid Claim in such country, if any, and (b) the
expiration of any data exclusivity period in such country that would prevent
third parties from securing a Registration in such country for a product that
contains any of denileukin difitox, bexarotene or alitretinoin, as applicable,
based, in whole or part, on data relating to the corresponding Product.

         "EXECUTION DATE" means the date set forth in the preamble of this
Agreement.

         "EXPIRATION DATE" has the meaning set forth in SECTION 11.1(D).

         "EXW" means "ex works," as defined in Incoterms 2000, published by the
International Chamber of Commerce.

         "FDA" means the United States Food and Drug Administration, or any
successor agency thereto.

         "FINAL ALLOCATION" has the meaning set forth in SECTION 2.7(A).

         "FINANCIAL STATEMENT DATE" has the meaning set forth in SECTION 4.17.

         "FINANCIAL STATEMENTS" has the meaning set forth in SECTION 4.17.

         "FSS" has the meaning set forth in SECTION 8.5(E)(I).

         "GAAP" means United States generally accepted accounting principles,
consistently applied.

         "GOOD CLINICAL PRACTICES" means the international ethical, scientific,
and quality standards for designing, conducting, recording, and reporting trials
that involve the participation of human subjects, as set forth by the
International Conference on Harmonization E6: Good Clinical Practices
Consolidated Guideline, or as required by applicable Law.

         "GOOD MANUFACTURING PRACTICES" means standards and methods to be used
in, and the facilities or controls to be used for, the manufacture, processing,
packaging, testing or holding of a drug to assure that such drug meets the
requirements of applicable Law and other requirements of any Governmental
Authority as to safety, identity and strength, and meets the quality and purity
characteristics that it purports or is represented to possess.

                                       6


         "GOVERNMENT MULTI-PRODUCT CONTRACTS" means Contracts by which Seller,
Seller Sub or any of their respective Affiliates dispenses both a Product and
other pharmaceutical products of Seller or Seller Sub through a government
agency.

         "GOVERNMENTAL AUTHORITY" means any nation or government, any
provincial, state, regional, local or other political subdivision thereof, any
supranational organization of sovereign states, and any entity, department,
commission, ministry, bureau, agency, authority, board, court, tribunal,
arbitrator, official or officer, domestic or foreign, exercising executive,
judicial, regulatory or administrative functions of or pertaining to government.

         "HIRED EMPLOYEE" has the meaning set forth in SECTION 9.1(A).

         "HSR ACT" means the United States Hart-Scott-Rodino Antitrust
Improvements Act of 1976, as amended, and the rules and regulations promulgated
thereunder.

         "IND" means (a) an Investigational New Drug Application, as defined in
the Act, which is required to be filed with the FDA before beginning clinical
testing of a product in human subjects, or any successor application or
procedure, and (b) all supplements and amendments that may be filed with respect
to the foregoing.

         "INDEMNIFIED PARTY" has the meaning set forth in SECTION 11.4(A).

         "INDEMNIFYING PARTY" has the meaning set forth in SECTION 11.4(A).

         "INDEMNITY CLAIM" has the meaning set forth in SECTION 11.5(A).

         "INDEMNITY DISPUTE NOTICE" has the meaning set forth in SECTION
11.4(B).

         "INDENTURE" has the meaning set forth in SECTION 4.3(A).

         "INTELLECTUAL PROPERTY" means intellectual property rights, including
Trademarks, Copyrights and Patents, whether registered or unregistered, and all
applications and registrations therefor, Know-How, confidential information,
trade secrets, and similar proprietary rights in confidential inventions,
discoveries, analytic models, improvements, processes, techniques, devices,
methods, patterns, formulations and specifications.

         "INVENTORY" means all inventory of finished Product that is formulated,
labeled or otherwise intended for use, sale or offer for sale under a Product
Mark, owned by Seller, Seller Sub or any of their respective Affiliates as of
the Closing Date which has not been shipped to a wholesaler or distributor
together with all Product work-in-progress, packaging and all bulk active
pharmaceutical ingredient related to any Product owned by Seller, Seller Sub or
any of their respective Affiliates as of the Closing Date.

         "IRS" means the Internal Revenue Service of the United States.

         "KNOW-HOW" means any proprietary or nonproprietary information
necessary or useful to the manufacture, preparation, development (including
research, pre-clinical and clinical), or commercialization of a product,
including data, product specifications, processes, product

                                       7


designs, validation methods and procedures, plans, trade secrets, ideas,
concepts, inventions, formulae, chemical, pharmacological, toxicological,
pharmaceutical, physical, analytical, stability, safety, quality assurance,
quality control and clinical information, technical information, research
information, marketing and sales information, and all other confidential or
proprietary technical and business information, whether or not embodied in any
documentation or other tangible materials, including any trade secret or other
rights therein.

         "KNOWLEDGE" means, with respect to Seller, the actual knowledge,
following a reasonable internal investigation, of any of the Persons set forth
on SCHEDULE 1.1(C) of the Seller Disclosure Schedule.

         "LABELING" shall be as defined in Section 201(m) of the Act (21 U.S.C.
ss. 321(m)) and other comparable foreign Law relating to the subject matter
thereof, including the applicable Product's label, packaging and package inserts
accompanying such Product, and any other written, printed, or graphic materials
accompanying such Product, including patient instructions or patient indication
guides.

         "LAW" means each provision of any federal, provincial, state, local or
foreign law, statute, ordinance, order, code, rule, requirement or regulation
(including any published guidelines, guidance or pronouncements having the
effect of law), promulgated or issued by any Governmental Authority, as well as
any judgments, decrees, injunctions or agreements issued or entered into by any
Governmental Authority specifically with respect to Seller, Seller Sub, any
Product or the Product Line Business.

         "LIABILITY" means, collectively, any liability, indebtedness, guaranty,
endorsement, claim, loss, damage, deficiency, interest, penalty, cost, expense,
obligation or responsibility, whether fixed or unfixed, known or unknown, choate
or inchoate, liquidated or unliquidated, secured or unsecured, direct or
indirect, matured or unmatured, or absolute, contingent or otherwise, including
any product liability and liability for Taxes.

         "LOSSES" means all losses, expenses, Liabilities or other damages,
including reasonable costs of investigation and attorneys' fees.

         "MATERIAL ADVERSE EFFECT" means any event, change, condition or effect
that individually or in the aggregate, (a) has a material adverse effect on the
ONTAK Product or the Targretin Capsules Product or the business, operations,
condition (financial or otherwise), or results of operations of the Product Line
Business taken as a whole, but shall exclude: (i) events, changes, conditions or
effects that generally affect the industries in which Seller and Seller Sub
operate or the manufacture or Distribution of any pharmaceutical product
(including legal and regulatory changes), (ii) general economic or political
events, changes, conditions or effects affecting the securities markets
generally, (iii) events, changes, conditions or effects outside of the control
of Seller, Seller Sub or any of their respective Affiliates arising from the
consummation of the Transactions or the announcement of the execution of this
Agreement, or (iv) events, changes, conditions or effects caused by acts of
terrorism or war (whether or not declared) occurring after the Execution Date
and prior to the Closing Date; PROVIDED, that in the case of clauses (i), (ii)
and (iv) above, the Product Line Business is not disproportionately affected by
such changes, conditions or effects as compared to the pharmaceutical industry
as a whole; (b) materially

                                       8


impacts, materially delays or prevents the consummation of the Transactions;
(c) creates a material limitation on the ability of Purchaser to conduct
the Product Line Business in a manner as has been conducted by Seller and Seller
Sub immediately prior to the Effective Time; or (d) creates a material
limitation on the ability of Purchaser to acquire good and valid title to or
other ownership right or interest in a material portion of the Purchased Assets
and Inventory, taken as a whole, free and clear of all Encumbrances (other than
Permitted Encumbrances).

         "MEDICAL PRODUCT REGULATORY AUTHORITY" means any Governmental Authority
that is concerned with the safety, efficacy, reliability, manufacture,
investigation, sale or marketing of pharmaceuticals, medical products, biologics
or biopharmaceuticals, including the FDA and the EMEA.

         "MULTIEMPLOYER PLAN" means a Plan that is a "multiemployer plan" within
the meaning of section 3(37) of ERISA.

         "NDA" means a New Drug Application for any product requesting
permission to place the product on the market in accordance with the Act,
together with all supplements or amendments filed with respect thereto pursuant
to the requirements of the Act, including all documents, data and other
information concerning the product which are reasonably necessary for the FDA
approval to market the product in the United States.

         "NDC" means the "National Drug Code", which is the eleven digit code
registered by a company with the FDA with respect to a pharmaceutical product.

         "NON-ASSIGNABLE RIGHT" has the meaning set forth in SECTION 2.5(A).

         "NOTICE OF OBJECTION" has the meaning set forth in SECTION 2.8(B).

         "NOTICE OF SUPERIOR PROPOSAL" has the meaning set forth in SECTION
6.5(B).

         "OMITTED ASSET" has the meaning set forth in SECTION 2.1(C).

         "ONTAK MANUFACTURE AND SUPPLY AGREEMENT" means the Manufacture and
Supply Agreement, dated as of January 1, 2004, by and among Seller Sub and
Cambrex Bio Science Hopkinkton, Inc., a Delaware corporation.

         "ONTAK MANUFACTURE AND SUPPLY AGREEMENT ASSIGNMENT" means the
Assignment and Assumption of Contract with respect to the ONTAK Manufacture and
Supply Agreement, in substantially the form attached hereto as EXHIBIT E.

         "ONTAK PATENTS" means those Patents owned by, licensed to or otherwise
controlled by Seller, Seller Sub or any of their respective Affiliates that
relate primarily or exclusively to the manufacture, use or Distribution of the
ONTAK Product, as set forth on SCHEDULE 1.1(D) of the Seller Disclosure
Schedule.

         "ONTAK PRODUCT" means all dosage forms, formulations, strengths,
package sizes and types of pharmaceutical products containing denileukin
difitox, a recombinant DNA-derived

                                       9


cytotoxic protein sold in the United States under the Trademark ONTAK(R) as
escribed in the FDA-approved product insert attached hereto as EXHIBIT F.

         "ORANGE BOOK" means the listing of approved drug patents with
therapeutic evaluations published by the FDA and commonly known at the Execution
Date as the "Orange Book," and available electronically at
HTTP://WWW.FDA.GOV/CDER/OB/DEFAULT.HTM.

         "ORDER" means any writ, judgment, decree, injunction or similar order,
including consent orders, of any Governmental Authority (in each such case
whether preliminary or final).

         "OTHER AGREEMENTS" means, collectively, the Assignment of U.S. Product
Marks, the Assignment of Non-U.S. Product Marks, the Assignment of U.S. Product
Patent Rights, the Assignment of Non-U.S. Product Patent Rights, the Bill of
Sale and Assignment and Assumption Agreements-U.S., the Bill of Sale and
Assignment and Assumption Agreements-Non-U.S., the Escrow Agreement, the ONTAK
Manufacture and Supply Agreement Assignment, Targretin Manufacture and Supply
Agreement Assignment and the Transition Services Agreement.

         "OUTSIDE DATE" has the meaning set forth in SECTION 10.1(A)(II).

         "PANRETIN PATENTS" means those Patents owned by, licensed to or
otherwise controlled by Seller, Seller Sub or any of their respective Affiliates
that relate primarily or exclusively to the manufacture, use or Distribution of
the Panretin Product, as set forth on SCHEDULE 1.1(E) of the Seller Disclosure
Schedule.

         "PANRETIN PRODUCT" means all dosage forms, formulations, strengths,
package sizes and types of pharmaceutical products containing a gel formation of
alitretinoin described in NDA #20-886 and currently commercialized in the
Territory as Panretin(R) Gel.

         "PARTY" or "PARTIES" has the meaning set forth in the first paragraph
of this Agreement.

         "PATENTS" means: (a) all national, regional and international patents
and patent applications, including provisional patent applications; (b) all
patent applications filed either from such patents, patent applications or
provisional applications or from an application claiming priority from either of
these, including divisionals, continuations, continuations-in-part,
substitutions, provisionals, converted provisionals, and continued prosecution
applications; (c) any and all patents that have issued or in the future will
issue from the foregoing patent applications described in clauses (a) and (b),
including utility models, petty patents and design patents and certificates of
invention; (d) any and all extensions or restorations by existing or future
extension or restoration mechanisms, including revalidations, reissues,
re-examinations and extensions (including any supplementary protection
certificates and the like) of the foregoing patents or patent applications
described in clauses (a), (b) and (c); (e) any and all causes of action, claims,
demands or other rights occasioned from or because of any and all past, present
and future infringement of any of the foregoing, including all rights to recover
damages (including attorneys' fees), profits and injunctive or other relief for
such infringement; and (f) any similar rights, including any importation,
revalidation, confirmation or introduction patent or registration patent or
patent of additions to any such foregoing patent applications and patents.

         "PDM ACT" means the Prescription Drug Marketing Act of 1987, as
amended.

                                       10


         "PERMITTED ENCUMBRANCES" means: (a) statutory liens for current Taxes
not yet due and payable or Taxes being contested in good faith by appropriate
proceedings for which adequate reserves have been established in accordance with
GAAP; (b) mechanics', carriers', workers', repairers', and other similar liens
arising or incurred in the ordinary course of business relating to obligations
as to which there is no default on the part of Seller, Seller Sub or any of
their respective Affiliates or the validity or amount of which is being
contested in good faith by appropriate proceedings; (c) as to Assets evidenced
by written documents, Encumbrances set forth on the face of such documents; (d)
Encumbrances set forth on SCHEDULE 1.1(F); and (e) such other Encumbrances,
other than liens securing the payment of money, as do not materially detract
from the value of or materially impair the use of the affected Asset as
heretofore owned or used by Seller or Seller Sub.

         "PERSON" means any individual, corporation, partnership, joint venture,
limited liability company, trust or unincorporated organization or Governmental
Authority.

         "PLAN" means any employment, bonus, deferred compensation, incentive
compensation, stock ownership, stock purchase, stock appreciation, restricted
stock, stock option, "phantom" stock, performance, stock bonus, paid time off,
perquisite, fringe benefit, vacation, retirement, retiree medical or life
insurance, supplemental retirement, severance or other benefit plans, programs
or arrangements, and all employment, termination, severance or other contracts
or agreements, or other program, policy or arrangement.

         "POST-CLOSING TAX PERIOD" has the meaning set forth in SECTION 8.9(B).

         "POTENTIAL EMPLOYEES" has the meaning set forth in SECTION 9.1(A).

         "PRE-CLOSING TAX PERIOD" has the meaning set forth in SECTION 8.9(B).

         "PRODUCT" or "PRODUCTS" means the ONTAK Product, the Panretin Product,
the Targretin Capsules Product and the Targretin Gel Product, individually or
collectively, as applicable.

         "PRODUCT COPYRIGHTS" means all Copyrights owned by, licensed to or
otherwise controlled by Seller, Seller Sub or any of their respective Affiliates
related primarily or exclusively to the Products or the Product Line Business,
as set forth on SCHEDULE 1.1(G) of the Seller Disclosure Schedule.

         "PRODUCT EMPLOYEE" means an employee who is employed by Seller, Seller
Sub or any of their respective Affiliates in connection with the Product Line
Business and whose services are primarily or exclusively related to the Product
Line Business.

         "PRODUCT EMPLOYEE LIST" has the meaning set forth in SECTION 4.12(A).

         "PRODUCT EQUIPMENT" means the manufacturing tools, storage devices and
test equipment owned by Seller, Seller Sub or any of their respective Affiliates
and used primarily or exclusively to manufacture, store or test Products, as set
forth on SCHEDULE 1.1(H) of the Seller Disclosure Schedule.

                                       11



         "PRODUCT INTELLECTUAL PROPERTY" means the Product Patent Rights,
Product Copyrights, Product Know-How, Product Marks, and Product Trade Dress.

         "PRODUCT KNOW-HOW" means the Know-How owned by, licensed to or
otherwise controlled by Seller, Seller Sub or any of their respective Affiliates
and exclusively or primarily related to any Product or the Product Line Business
in the Territory.

         "PRODUCT LINE BUSINESS" has the meaning set forth in the second
paragraph of this Agreement.

         "PRODUCT MARKS" means, individually or collectively, as applicable, the
Trademarks "ONTAK(R)", "Panretin(R)", and "Targretin(R)" or such other
Trademarks set forth on SCHEDULE 1.1(I) of the Seller Disclosure Schedule, and
all common law rights, applications and registrations therefor, and all goodwill
associated therewith.

         "PRODUCT PATENT RIGHTS" means, collectively, the ONTAK Patents,
Panretin Patents and Targretin Patents.

         "PRODUCT RECORDS" means to the extent permitted under and consistent
with the requirements of applicable Law, all books and records relating
primarily or exclusively to any Product, including copies of all material
customer and supplier lists, account lists, call data, sales history, call
notes, marketing studies, consultant reports, physician databases, and
correspondence (excluding invoices) with respect to any Product or the Product
Line Business to the extent maintained by Seller, Seller Sub or any of their
respective Affiliates, and all complaint files and adverse event files with
respect to any Product; PROVIDED, HOWEVER, that (a) in each case, Seller and
Seller Sub may redact any Excluded Intellectual Property contained therein; (b)
Seller and Seller Sub may retain: (i) a copy of any such books and records to
the extent necessary for Tax, regulatory, accounting or litigation; (ii) a copy
of any such books and records to the extent such books and records relate
primarily but not exclusively to any Product or the Product Line Business,
PROVIDED redactions are made to exclude all information relating exclusively to
any Product or the Product Line Business; (iii) all books, documents, records
and files prepared in connection with or relating to the Transactions, including
bids received from other parties and strategic, financial or Tax analyses
relating to the divestiture of the Purchased Assets, the Assumed Liabilities,
the Products and the Product Line Business; and (iv) any attorney work product,
attorney-client communications and other items protected by legal privilege
shall be excluded; and (c) Seller and Seller Sub shall be entitled to redact
from any such books and records any information that does not relate to any
Product or the Product Line Business.

         "PRODUCT TRADE DRESS" means the trade dress, package designs, product
inserts, labels, logos and associated artwork owned by, licensed to or otherwise
controlled by Seller, Seller Sub or any of their respective Affiliates used
primarily or exclusively in connection with any Product or the packaging
therefor in the Territory, as set forth on SCHEDULE 1.1(J) of the Seller
Disclosure Schedule, but with the exception of the Product Marks, specifically
excluding all Seller Brands used thereon.

         "PROMOTIONAL MATERIALS" means Labeling, Product informational letters,
and the advertising, promotional and media materials, sales training materials
(including any related

                                       12


outlines and quizzes/answers, if any), trade show materials (including
displays and trade show booths) and videos, including materials containing
post-marketing clinical data, if any, owned by Seller, Seller Sub or any of
their respective Affiliates and used primarily or exclusively for the
commercialization of any Product in the Territory (including Distribution and
sales promotion information, market research studies and toll-free telephone
numbers) as set forth on SCHEDULE 1.1(K) of the Seller Disclosure Schedule.

         "PTO" means the United States Patent and Trademark Office.

         "PURCHASE PRICE" has the meaning set forth in SECTION 2.6.

         "PURCHASE PRICE ALLOCATION" has the meaning set forth in SECTION
2.7(A).

         "PURCHASE PRICE BANK ACCOUNT" means a bank account in the United States
to be designated by Seller in a written notice to Purchaser at least three (3)
Business Days before the Closing.

         "PURCHASED ASSETS" has the meaning set forth in SECTION 2.1(A).

         "PURCHASER" has the meaning set forth in the first paragraph of this
Agreement.

         "PURCHASER INDEMNIFIED PARTIES" has the meaning set forth in SECTION
11.2.

         "PURCHASER'S 401(K) PLAN" has the meaning set forth in SECTION 9.2(A).

         "REBATE TERMINATION DATE" has the meaning set forth in SECTION
8.5(C)(I).

         "REGISTRATIONS" means (a) with respect to a country in the Territory,
any and all approvals, licenses, registrations or authorizations of any
Governmental Authority issued to or received by any of Seller, Seller Sub or any
of their respective Affiliates as of the Execution Date, or that are issued to
or received by any of Seller, Seller Sub or any of their respective Affiliates
after the Execution Date but on or prior to the Closing Date, that are necessary
for the manufacture, use or Distribution of the Products in such country
(including any BLAs, NDAs, INDs or foreign equivalents thereof, any pricing or
reimbursement approvals, non-clinical and clinical study authorizations, pre-
and post-approval marketing authorizations and Labeling approvals), and any
registrations or applications for, supplements or amendments to, the foregoing;
(b) all supporting files, writings, data, studies, reports and other written
materials filed as part of, or referenced in, such approvals, registrations,
applications or notifications, or maintained by any of Seller, Seller Sub or any
of their respective Affiliates and relating to such approvals, registrations,
applications or notifications; and (c) all correspondence to or with the FDA,
EMEA or any other Governmental Authority with respect to the Products or the
Product Line Business.

         "REIMBURSEMENT ACCOUNTS" has the meaning set forth in SECTION 9.2(F).

         "REPRESENTATIVES" means, with respect to any Person, the directors,
officers, managers, employees, advisors, independent contractors, agents or
consultants of such Person.

                                       13


         "REQUIRED CLOSING DATE INVENTORY VALUE" means Nine Million Seven
Hundred Fifty Thousand Dollars ($9,750,000).

         "RIGHTS AGREEMENT" has the meaning set forth in SECTION 4.3(A).

         "SEC" means the United States Securities and Exchange Commission, or
any successor agency thereto.

         "SECURITIES ACT" means the United States Securities Act of 1933, as
amended, and the rules, regulations and SEC guidance promulgated thereunder, as
may be in effect from time to time.

         "SELLER" has the meaning set forth in the first paragraph of this
Agreement.

         "SELLER BRANDS" means the Trademarks owned or used by Seller, Seller
Sub or any of their respective Affiliates, whether or not registered, including
the names "Seller" and "Seller Sub", other than the Product Marks and Product
Trade Dress.

         "SELLER DISCLOSURE SCHEDULE" means the disclosure schedules delivered
by Seller and Seller Sub to Purchaser in connection with this Agreement.

         "SELLER INDEMNIFIED PARTIES" has the meaning set forth in SECTION 11.3.

         "SELLER PLAN" means all Plans in which any Product Employee
participates or participated, or under which any Product Employee has accrued
any benefit or right whatsoever, that is maintained by, contributed to or
required to be contributed to by Seller or any of its ERISA Affiliates or as to
which Seller or any of it ERISA Affiliates has any Liability.

         "SELLER'S 125 PLAN" has the meaning set forth in SECTION 9.2(F).

         "SELLER'S 401(K) PLAN" has the meaning set forth in SECTION 9.2(A).

         "SELLER'S COMMON STOCK" means the common stock, par value $.001 per
share, of Seller.

         "SELLER'S SEC FILINGS" means all forms, reports and other documents
required to be filed or furnished by Seller under the Securities Act or Exchange
Act, as the case may be, since and including January 1, 2004.

         "SUPERIOR PROPOSAL" means an Acquisition Proposal that in the good
faith judgment of the board of directors of Seller (after considering the advice
of its financial advisors and outside legal counsel) would, if consummated,
result in a transaction that is more favorable, taken as a whole, to Seller's
stockholders than the Transactions, and the board of directors of Seller intends
to terminate this Agreement in connection with such determination.

         "TARGRETIN CAPSULES PRODUCT" means all dosage forms, formulations,
strengths, package sizes and types of pharmaceutical products containing a
formation of bexarotene (other than the Targretin Gel Product) described in NDA
#21-055 and currently commercialized in the Territory as Targretin(R) Capsules.

                                       14



         "TARGRETIN GEL PRODUCT" means the pharmaceutical product containing the
gel form of bexarotene described in NDA #21-056, in any and all strengths and
package sizes and currently commercialized in the Territory as Targretin(R) Gel.

         "TARGRETIN MANUFACTURE AND SUPPLY AGREEMENT" means the Manufacture and
Commercial Supply Agreement, dated as of June 1, 1999, by and between Raylo
Chemicals Inc., an Edmonton, Alberta corporation, and Seller.

         "TARGRETIN MANUFACTURE AND SUPPLY AGREEMENT ASSIGNMENT" means the
Assignment and Assumption of Contract with respect to the Targretin Manufacture
and Supply Agreement, in substantially the form attached hereto as EXHIBIT G.

         "TARGRETIN PATENTS" means those Patents owned by, licensed to or
otherwise controlled by Seller, Seller Sub or any of their respective Affiliates
that related primarily or exclusively to the manufacture, use or Distribution of
the Targretin Capsules Product or the Targretin Gel Product, as set forth on
SCHEDULE 1.1(L) of the Seller Disclosure Schedule.

         "TAX" or "TAXES" means any and all taxes, assessments, levies, tariffs,
duties or other charges or impositions in the nature of a tax (together with any
and all interest, penalties, additions to tax and additional amounts imposed
with respect thereto) imposed by any Governmental Authority, including income,
estimated income, gross receipts, profits, business, license, occupation,
franchise, capital stock, real or personal property, sales, use, transfer, value
added, employment or unemployment, social security, disability, alternative or
add-on minimum, customs, excise, stamp, environmental, commercial rent or
withholding taxes, and shall include any Liability for Taxes of any other Person
under applicable Law, as a transferee or successor, by contract or otherwise.

         "TAX RETURN" means any report, return (including any information
return), claim for refund, election, estimated Tax filing or payment, request
for extension, document, declaration or other information or filing required to
be supplied to any Governmental Authority with respect to Taxes, including
attachments thereto and amendments thereof.

         "TERMINATION FEE" has the meaning set forth in SECTION 10.2(B).

         "TERRITORY" means worldwide.

         "TRADEMARK" means: (a) all trademarks, trade names, trade dress,
service marks, logos, trade styles, certification marks, collective marks, other
source of product identifiers, designs and general intangibles of a like nature,
including Internet domain names and e-mail addresses, in each case whether
registered or unregistered; (b) all registrations and applications for any of
the foregoing; (c) all extensions or renewals of any of the foregoing; (d) all
of the goodwill connected with the use of and symbolized by the foregoing; (e)
all rights and priorities afforded under the United States "common law" or under
any international treaty, convention, or the like, related to any of the
foregoing; (f) the right to sue for past, present and future infringement or
dilution of any of the foregoing or for any injury to goodwill; and (g) all
proceeds of the foregoing, including license royalties, income, payments,
claims, damages (including attorneys' fees) and proceeds of suit.

                                       15



         "TRANSACTIONS" means the transactions contemplated by this Agreement
and the Other Agreements.

         "TRANSFER TAXES" means any and all transfer, documentary, sales, use,
gross receipts, stamp, registration, value added, recording, escrow and other
similar Taxes and fees (including any penalties and interest) incurred in
connection with the Transactions (including recording and escrow fees and any
real property or leasehold interest transfer or gains tax and any similar Tax).

         "TRANSITION SERVICES AGREEMENT" means that certain Transition Services
Agreement, between Seller, Seller Sub and Purchaser, in substantially the form
attached hereto as EXHIBIT H.

         "UNITS" means the arithmetical equivalent of (a) with respect to the
ONTAK Product, one 2ml vial containing 300 mcg of recombinant denileukin
difitox, (b) with respect to the Targretin Gel Product, one 60g tube containing
1% (w/w) of bexarotene, (c) with respect to the Panretin Product, one 60g tube
containing 0.1% (w/w) of alitretinoin, and (d) with respect to the Targretin
Capsules Product, 100 capsule bottles of 75mg capsules of bexarotene.

         "VALID CLAIM" means, with respect to a Product in a country, a claim of
an issued and unexpired Product Patent Right that claims denileukin difitox,
bexarotene or alitretinoin, as applicable, as a composition of matter in such
country or the use of such Product for an indication included in the
Registration for such Product in such country, that has not been held
permanently revoked, unenforceable or invalid by a Governmental Authority of
competent jurisdiction, unappealable or unappealed within the time allowed for
appeal, and that has not been admitted to be invalid or unenforceable through
reissue, disclaimer or otherwise.

    Section 1.2  OTHER DEFINITIONAL PROVISIONS.

             (a) When a reference is made in this Agreement to an Article,
Section, Exhibit or Schedule, such reference is to an Article or Section of, or
an Exhibit or Schedule to, this Agreement unless otherwise indicated.

             (b) The words "hereof," "herein," "hereto" and "hereunder" and
words of similar import, when used in this Agreement, shall refer to this
Agreement as a whole and not to any particular provision of this Agreement.

             (c) The terms defined in the singular has a comparable meaning
when used in the plural, and vice versa.

             (d) Words of one gender include the other gender.

             (e) References to a Person are also to its successors and
permitted assigns.

             (f) The term "dollars" and "$" means United States dollars.

             (g) The word "including" means "including without limitation" and
the words "include" and "includes" have corresponding meanings.

                                       16



             (h) The term "or" has, except where otherwise indicated, the
inclusive meaning represented by the phrase "and/or".

             (i) For purposes of this Agreement, the term "commercially
reasonable efforts" will not be deemed to require a Person to undertake
extraordinary or unreasonable measures, including payments of amounts in excess
of normal and usual filing fees and processing fees, if any, or other payments
with respect to any Assigned Contract or Applicable Permit that are significant
in the context of such Assigned Contract or Applicable Permit (or significant on
an aggregate basis as to all Assigned Contracts and Applicable Permits), except
if such payment is otherwise prescribed in such Assigned Contract or Applicable
Permit or under Law relating to such Assigned Contract or Applicable Permit.

             (j) For the avoidance of doubt, for purposes of this Agreement,
Product shall be deemed "sold" by: (i) Seller, Seller Sub or any of their
respective Affiliates only if the Product has been shipped to a wholesale
distributor of the Product on or prior to 11:59 p.m. California time on the
Closing Date; and (ii)Purchaser or any of its Affiliates during any period
thereafter.

             (k) For purposes of this Agreement, the term "made available" shall
mean, with respect to any information, documentation or other materials, that
such information, documentation or other materials were contained and properly
indexed in a Data Room or otherwise physically delivered to Purchaser or
Purchaser's counsel.

                                  ARTICLE II.
                                PURCHASE AND SALE

    Section 2.1   TRANSFER OF PURCHASED ASSETS AND INVENTORY.

             (a)  PURCHASE AND SALE OF PURCHASED ASSETS. At the Effective Time,
on the terms and subject to the conditions hereof and in consideration of the
Purchase Price (as allocated pursuant to SECTION 2.7) paid to Seller by
Purchaser, Seller and Seller Sub will (and, as applicable, will cause their
respective Affiliates to) sell, convey, transfer, assign and deliver to
Purchaser, and Purchaser will purchase, take delivery of and acquire from Seller
and Seller Sub (and their respective Affiliates, as applicable), all of Seller's
and Seller Sub's (and, as applicable, their respective Affiliates') right, title
and interest in, to and under all of the following Assets (other than the
Inventory which shall be sold, conveyed, transferred, assigned and delivered to
Purchaser under SECTION 2.1(B)) (collectively, the "PURCHASED ASSETS"):

                  (i)       the Assigned Contracts;

                  (ii)      the Promotional Materials;

                  (iii)     the Applicable Permits to the extent permitted
              under and consistent with the requirements of applicable Law;

                  (iv)      the Product Records;

                  (v)       the Product Equipment;

                                       17



                  (vi)      the Product Intellectual Property; and

                  (vii)     all goodwill of or relating to the Products or the
              Product Line Business.

             (b)  PURCHASE AND SALE OF INVENTORY. At the Effective Time, on the
terms and subject to the conditions hereof and in consideration of the Purchase
Price (as allocated pursuant to SECTION 2.7) paid to Seller by Purchaser, Seller
and Seller Sub will (and, as applicable, will cause their respective Affiliates
to) sell, convey, transfer, assign and deliver to Purchaser, and Purchaser will
purchase, acquire and, in accordance with SECTION 3.2(A)(I), take delivery from
Seller and Seller Sub (and, as applicable, their respective Affiliates) of all
of Seller's and Seller Sub's (and, as applicable, their respective Affiliates')
right, title and interest in and to the Inventory.

             (c)  OMITTED ASSETS. Following the Closing, to the extent not
previously sold, conveyed, transferred, assigned or otherwise delivered to
Purchaser at Closing pursuant to SECTIONS 2.1(A), as applicable, Seller and
Seller Sub shall (and, as applicable, will cause their respective Affiliates to)
convey, transfer, assign and deliver to Purchaser and Purchaser shall take
delivery of and acquire from Seller and Seller Sub (and, as applicable, their
respective Affiliates) all of their right, title and interest in, to and under
any Assets (and, in the case of Assigned Contracts, all Liabilities associated
therewith arising after the date of such transfer (other than such Liabilities
that (A) were otherwise required to have been paid, performed or discharged on
or prior to such date, (B)relate to goods or services received or sold on or
prior to such date, (C) that otherwise result from a breach of or default under
any such Assigned Contract on or prior to such date, or (D) are not related in
any way to the Products or the Product Line Business)) as of the Effective Time
of the following categories (without, in each case, the requirement that Assets
of the category in question be listed in the Seller Disclosure Schedule to which
the related definition refers) (collectively, the "OMITTED ASSETS"):

                  (i)    Assigned Contracts;

                  (ii)   Promotional Materials;

                  (iii)  Applicable Permits, to the extent permitted under and
             consistent with the requirements of applicable Law;

                  (iv)   Product Records;

                  (v)    Product Equipment; and

                  (vi)   Product Intellectual Property.

The Parties acknowledge and agree that any Omitted Asset required by this
SECTION 2.1(C) to be transferred by Seller or Seller Sub (or, as applicable,
their respective Affiliates) on the one hand and acquired by Purchaser on the
other hand, shall for all purposes of this Agreement (other than SECTION
11.2(E)) be deemed to have been an "Assigned Contract," "Promotional Material,"
"Applicable Permit," "Product Record," item of "Product Equipment" or "Product
Intellectual Property," as applicable (without regard to the Seller Disclosure
Schedule referred to in such

                                       18


definition) and a "Purchased Asset" and shall be deemed to have been included
in the applicable Seller Disclosure Schedule as of the Execution Date.

     Section 2.2  EXCLUDED ASSETS. Without prejudice to SECTION 2.1, the Parties
acknowledge and agree that neither Seller nor Seller Sub (nor, their respective
Affiliates) is selling, conveying, transferring, delivering or assigning any
rights whatsoever, and Purchaser is not purchasing, taking delivery of or
acquiring any rights whatsoever, to any other products, product lines,
businesses or corporate Assets of Seller, Seller Sub or any of their respective
Affiliates other than the Purchased Assets and the Inventory (collectively, the
"EXCLUDED Assets").

     Section 2.3  ASSUMED LIABILITIES. As of the Effective Time, upon the terms
and subject to the conditions set forth in this Agreement, Purchaser shall
assume and pay, perform or otherwise discharge when due, in accordance with
their respective terms and subject to the respective conditions thereof, only
the following Liabilities (collectively, the "ASSUMED LIABILITIES"), and no
other Liabilities of any kind:

             (a)  any Liability (including any Liability to third parties for
royalty, license fee and other payment obligations under the Assigned Contracts)
arising after the later of (i) the Closing Date, or (ii) the date on which (A)
the Assigned Contract is assigned by Seller or Seller Sub (or, as applicable,
any of their respective Affiliates) to Purchaser or (B) the practical benefit of
such Assigned Contract is provided to Purchaser pursuant to SECTION 2.5,
including any Liability under any Assigned Contract that was entered into by
Seller or Seller Sub after the Execution Date in accordance with SECTION 6.2
(other than such Liabilities that (A) were otherwise required to have been paid,
performed or discharged on or prior to the later of the dates determined under
clause (ii) above, (B) relate to goods or services received or sold on or prior
to such date, (C) that otherwise result from a breach of or default under any
such Assigned Contract on or prior to such date, or (D) are not related in any
way to the Products or the Product Line Business);

             (b)  any Liability in respect of Hired Employees, and
beneficiaries of Hired Employees, arising after the Closing Date that Purchaser
agrees to assume pursuant to this Agreement and that are not Excluded
Liabilities or otherwise retained by Seller, Seller Sub or any of their
respective Affiliates under ARTICLE IX; and

            (c)   any other Liability specifically and to the extent set forth
 on SCHEDULE 2.3 hereto.

    Section 2.4   EXCLUDED LIABILITIES. Notwithstanding anything to the
contrary contained herein, Seller and Seller Sub shall retain and shall be
responsible for paying, performing and discharging when due, and Purchaser shall
not assume or have any responsibility for any Liabilities of Seller, Seller Sub
or any of their respective Affiliates other than the Assumed Liabilities (the
"EXCLUDED LIABILITIES").

    Section 2.5   PROCEDURES FOR CERTAIN PURCHASED ASSETS NOT FREELY
                  TRANSFERABLE.

             (a)  If any Asset or right (other than the Applicable Permits)
included in the Purchased Assets is not assignable or transferable to Purchaser
either by virtue of the provisions

                                       19


thereof (or by virtue of agreements with respect thereto) or under
applicable Law without the consent of one or more third Persons (each, a
"NON-ASSIGNABLE RIGHT"), this Agreement and the related instruments of transfer
shall not constitute an assignment or transfer of the Non-Assignable Right. If
any such consent cannot be obtained prior to the Closing Date and the Closing
occurs, then, notwithstanding anything to the contrary contained in this
Agreement or any Other Agreement:

                  (i) until the earliest of (A) the date all such consents are
             obtained, (B) the date all such Assigned Contracts expire or are
             terminated; and (C) the date which is six (6) months from the
             Closing Date, Seller shall use commercially reasonable efforts to
             obtain such consent as soon as reasonably possible after the
             Closing Date and Purchaser shall cooperate, to the extent
             commercially reasonable, with Seller and Seller's efforts to obtain
             such consents; and

                  (ii) at Purchaser's election, (A) the Non-Assignable Right
             shall be an Excluded Asset and Purchaser shall have no obligation
             pursuant to SECTION 2.1(A) or SECTION 2.3 or otherwise with respect
             to any such Non-Assignable Right or any Liability with respect
             thereto, or (B) Seller shall use its ommercially reasonable efforts
             to obtain for Purchaser substantially all of the practical benefit
             and burden of such Non-Assignable Right, including by (1) entering
             into appropriate and reasonable alternative arrangements on terms
             mutually agreeable to Purchaser and Seller and (2)subject to the
             consent and control of Purchaser, enforcement, at the cost and for
             the account of Purchaser, of any and all rights of Seller against
             the other party thereto arising out of the breach or cancellation
             thereof by such other party or otherwise.

             (b)  If any of the Applicable Permits included in the Purchase
Assets are not assignable or transferable without obtaining a replacement
permit, then, notwithstanding anything to the contrary in this Agreement or any
Other Agreement, this Agreement and the related instruments of transfer shall
not constitute an assignment or transfer of such Applicable Permit, and Seller
and Seller Sub shall (and, as applicable,shall cause their respective Affiliates
to) cooperate to the extent commercially reasonable with Purchaser in its
efforts to obtain a replacement permit issued in Purchaser's name. If any
replacement Applicable Permit cannot be obtained prior to the Closing Date and
the Closing occurs, Seller (or Seller Sub) shall (and, as applicable, shall
cause their respective Affiliates to) allow Purchaser to operate under Seller's,
or Seller Sub's or such Affiliate's Applicable Permit if permitted by applicable
Law or applicable Governmental Authorities for a period of up to six (6) months
from the Closing Date (or such longer period as may be reasonably necessary for
Purchaser, using commercially reasonable efforts, to obtain the replacement
Applicable Permit).

     Section 2.6  PURCHASE PRICE. In consideration of the sale, transfer,
assignment,conveyance, license and delivery of the Purchased Assets and
Inventory under ARTICLE II, Purchaser shall, upon the Closing, assume the
Assumed Liabilities and pay to Seller, by direct wire transfer of immediately
available funds, Two Hundred and Five Million Dollars ($205,000,000) (subject to
the adjustments set forth in SECTION 2.8, the "PURCHASE PRICE"), which shall be
paid as follows: (a)One Hundred and Eighty-Five Million Dollars ($185,000,000)
shall be paid at the Closing to Seller, by direct wire transfer of immediately
available funds to the

                                       20


Purchase Price Bank Account; and (b) Twenty Million Dollars ($20,000,000)
(the"ESCROW AMOUNT") shall be deposited with the Escrow Agent at Closing, by
direct wire transfer of immediately available funds, to the account designated
by the Escrow Agent (the "ESCROW ACCOUNT"), in accordance \ with SECTION 11.6
and theEscrow Agreement.

    Section 2.7   PURCHASE PRICE ALLOCATION.

             (a)  As soon as practicable after the Closing Date Inventory
Statement becomes final pursuant to SECTION 2.8, Purchaser shall deliver to
Seller a statement (the "PURCHASE PRICE ALLOCATION"), allocating the Purchase
Price (PLUS the Assumed Liabilities, to the extent properly taken into account
under Section 1060 of the Code) among the Purchased Assets, the Inventory and
Seller's and Seller Sub's obligations under SECTION 6.7(B) in accordance with
Section 1060 of the Code and the Treasury Regulations thereunder. If within
fifteen (15) days after the delivery of the Purchase Price Allocation Seller
notifies Purchaser in writing that Seller objects to the allocation set forth in
the Purchase Price Allocation, Purchaser and Seller shall use commercially
reasonable efforts to resolve such dispute within twenty (20) days. In the event
that Purchaser and Seller are unable to resolve such dispute within twenty (20)
days, Purchaser and Seller shall jointly retain the Accountants (which may in
turn select an appraiser if needed) to resolve the disputed items. Upon
resolution of the disputed items, the allocation reflected on the Purchase Price
Allocation shall be adjusted to reflect such resolution (such resulting
allocation, the "FINAL ALLOCATION"). The costs, fees and expenses of the
Accountants shall be borne equally by Purchaser and Seller. Notwithstanding
anything to the contrary in this SECTION 2.7, the Final Allocation shall be
consistent with the values agreed to by the Parties for the purposes of
determining the amount of any Transfer Taxes paid prior to the completion of the
Final Allocation. Following final determination of the Final Allocation as
provided in this SECTION 2.7(A), the Final Allocation shall thereafter not be
adjusted and shall be binding on Seller and Purchaser except to reflect any
adjustments to the Purchase Price pursuant to SECTION 8.5 and ARTICLE XI or as
required pursuant to a "determination" within the meaning of Section 1313(a) of
the Code.

             (b)  In accordance with Section 1060 of the Code and the Treasury
Regulations thereunder, Purchaser, Seller Sub and Seller agree, unless otherwise
required pursuant to a "determination" within the meaning of Section 1313(a) of
the Code, to be bound by the Final Allocation, to file all Tax Returns
(including IRS Form 8594 and any supplemental or amended IRS Form 8594) in
accordance with the Final Allocation, and not to take any position inconsistent
with the Final Allocation in the course of any audit, examination, other
administrative or judicial proceeding, except as required by applicable Law. In
the event that the Final Allocation is disputed by any Governmental Authority,
the Party receiving notice of the dispute shall promptly notify the other
Parties hereto in writing of receipt of such notice and the subsequent
resolution of such dispute.

     Section 2.8  CLOSING DATE INVENTORY ADJUSTMENTS.

             (a)  At least six (6) Business Days prior to the Closing Date,
Seller shall prepare and provide to Purchaser a statement calculating in
reasonable detail the estimated amount and value of the Inventory as of the
Closing Date in accordance with SCHEDULE 2.8, taking into account applicable
inventory reserves in accordance with GAAP (the "CLOSING DATE

                                       21


INVENTORY VALUE"), together with supporting written documentation (the
"CLOSING DATE INVENTORY STATEMENT").

              (b)  During the thirty (30)-day period following the Closing
Date, Purchaser shall be permitted to review the Product Records (including all
of Seller's records and workpapers relating to Seller's calculation of the
Closing Date Inventory) to the extent reasonably necessary for Purchaser to
evaluate the Closing Date Inventory Statement. The Closing Date Inventory
Statement (and the Closing Date Inventory contained therein) shall become final
and binding upon Purchaser and Seller at the end of such thirty (30)-day period,
unless Purchaser objects that either (i) the Closing Date Inventory is less than
the Required Closing Date Inventory Value or (ii) the calculation of the Closing
Date Inventory Value is not in accord with SCHEDULE 2.8, in either of which
cases it shall send written notice (the "NOTICE OF OBJECTION") to Seller within
such period, setting forth in specific detail the basis for its objection and
Purchaser's proposal for any adjustments to the Closing Date Inventory
Statement. If a timely Notice of Objection is delivered to Seller, then the
Closing Date Inventory Statement (and the Closing Date Inventory contained
therein) shall become final and binding (except as provided below with respect
to resolution of disputes) on Seller and Purchaser on the first to occur of (i)
the date Seller and Purchaser resolve in writing any differences they have with
respect to the matters specified in the Notice of Objection and (ii) the date
all matters in dispute are finally resolved in writing by the Accountants, in
each case as provided below. Seller and Purchaser shall seek in good faith to
reach agreement as to any such proposed adjustment or that no such adjustment is
necessary within thirty (30) days following delivery of the Notice of Objection.
If agreement is reached in writing within such thirty (30)-day period as to all
proposed adjustments, or that no adjustments are necessary, Seller and Purchaser
shall revise the Closing Date Inventory Statement accordingly. If Seller and
Purchaser are unable to reach agreement within thirty (30) days following
delivery of the Notice of Objection, then the Accountants shall be engaged at
that time to review the Closing Date Inventory Statement, and shall make a
determination as to the resolution of any adjustments. The determination of the
Accountants of the Closing Date Inventory Statement (and the Closing Date
Inventory contained therein) shall be delivered as soon as practicable following
engagement of the Accountants, but in no event more than sixty (60) days
thereafter, and shall be final, conclusive and binding upon Seller and Purchaser
and the Parties shall revise the Closing Date Inventory Statement accordingly.
Subject to the exercise by a Party of applicable rights of appeal under
applicable Law, the Parties agree that judgment may be entered on such
determination in any court having jurisdiction. Seller, on the one hand, and
Purchaser, on the other hand, shall each pay one-half of the cost of the
Accountants.

              (c)  Within fifteen (15) Business Days after the date on which
the Closing Date Inventory Statement (and the Closing Date Inventory contained
therein) becomes final and binding on Seller and Purchaser in accordance with
SECTION 2.8(B), in the event that the value of the Closing Date Inventory
(calculated in accordance with SCHEDULE 2.8) is less than the Required Closing
Date Inventory Value, the Purchase Price shall be adjusted downward by an amount
equal to such difference. Notwithstanding SECTION 11.7(A), Seller promptly shall
pay such difference to Purchaser from Seller's own funds, and not from amounts
held in the Escrow Account, by wire transfer of immediately available funds to
an account designated by Purchaser.

                                       22


     Section 2.9   RISK OF LOSS. Until the Effective Time, any loss of or
damage to the Purchased Assets and Inventory from fire, flood, casualty or any
other similar occurrence shall be the sole responsibility of Seller and Seller
Sub. As of the Effective Time, title to the Purchased Assets and Inventory
(other than Non-Assignable Rights) shall be transferred to Purchaser. After the
Effective Time, Purchaser shall bear all risk of loss associated with the
Purchased Assets and Inventory (other than Non-Assignable Rights) and shall be
solely responsible for procuring adequate insurance to protect the Purchased
Assets and Inventory (other than Non-Assignable Rights) against any such loss.

     Section 2.10  TAX WITHHOLDING. The Parties agree that all payments under
this Agreement will be made without any deduction or withholding for
or on account of any Taxes unless required by applicable Tax Law. In the
event Purchaser determines that it is required under applicable Tax Law to
withhold any amount from any payments made to Seller or Seller Sub, such amount
shall be deducted by Purchaser and paid to the relevant Governmental Authority.
Purchaser shall give Seller reasonable advance notice of any such withholding
and the applicable law under which such withholding is required, and Purchaser
shall promptly furnish to Seller copies of any Tax certificate or other
documentation evidencing payment of any such withheld amount to the relevant
Governmental Authority. Purchaser shall not be required to pay any additional
amounts to Seller or Seller Sub in respect of any amounts withheld and paid to
any Governmental Authority pursuant to this SECTION 2.10. If a Governmental
Authority determines that Purchaser is liable for any amount Purchaser failed to
withhold from a payment made to Seller or Seller Sub, Seller shall promptly, but
in no event later than ten (10) Business Days after the presentation of a
statement evidencing payment of such amount by Purchaser to the Governmental
Authority, reimburse Purchaser for such amount, but only to the extent Seller or
Seller Sub have not previously paid the applicable Tax; PROVIDED, HOWEVER,
Seller and Seller Sub shall have no obligation to reimburse Purchaser for the
amount of any interest, penalties or similar amounts imposed on Purchaser on
account of Purchaser's failure to withhold at the time of payment, unless such
failure is attributable to Purchaser's reliance on incorrect or misleading
written certifications or statements provided to Purchaser by Seller or Seller
Sub in support of a claimed exemption from or reduction in withholding, in which
case Seller will reimburse Purchaser for such amounts of interest, penalties, or
similar amounts. Seller and Seller Sub shall promptly provide to Purchaser
written certifications or statements, reasonably requested by Purchaser, to
assist Purchaser in determining whether an exemption or reduction in withholding
is permitted. The Parties agree to reasonably cooperate with each other to
lawfully minimize any withholding obligations of Purchaser, including by
completing or filing documents required under the provisions of any applicable
income tax treaty or applicable Tax Law, to claim any applicable exemption from,
or reduction of, any applicable withholding Taxes.

                                  ARTICLE III.
                                     CLOSING

     Section 3.1   CLOSING. Upon the terms and subject to the conditions of
this Agreement, the Closing shall be held on a date to be specified by the
Parties, such date (the "Closing Date") to be no later than the third Business
Day after satisfaction or waiver of all of the conditions set forth in SECTIONS
7.1, 7.2(D) and 7.2(H), at the offices of Latham & Watkins LLP, 12636 High Bluff
Drive, Suite 400, San Diego, California 92130, unless the Parties otherwise
agree. The Parties will exchange (or cause to be exchanged) at the Closing the
funds, agreements,

                                       23


instruments, certificates and other documents, and do, or cause to be done, all
of the things respectively required of each Party as specified in Section 3.2.
The Closing shall be deemed to have occurred at 11:59 p.m. California time on
the Closing Date (the "Effective Time").

     Section 3.2   TRANSACTIONS AT CLOSING.  At the Closing, subject to the
terms and conditions hereof:

              (a)  SELLER'S AND SELLER SUB'S ACTIONS AND DELIVERIES. Seller
shall, and shall cause Seller Sub and Seller's and Seller Sub's respective
Affiliates to, where applicable, deliver or cause to be delivered to Purchaser:

                   (i) the Inventory, which Seller shall deliver to Purchaser,
          EXW, which Inventory shall be picked up by or on behalf of Purchaser
          at such location as designated by Seller as soon as reasonably
          practicable after the Closing Date, but in no event more than five (5)
          Business Days thereafter;

                   (ii) executed counterparts of each of the Other Agreements
          to which it is a party;

                   (iii) a letter from Seller or Seller Sub, as applicable, to
          the FDA, duly executed by Seller or Seller Sub, as applicable,
          transferring the rights to the Registrations to Purchaser;

                   (iv) a certificate, dated as of the Closing Date, duly
          executed by an authorized officer of each of Seller and Seller Sub,
          certifying:

                        (1) all persons executing this Agreement, each of the
               Other Agreements and any other documents delivered pursuant
               hereto or  thereto on behalf of Seller or Seller Sub, as
               applicable, are incumbent authorized officers of Seller or Seller
               Sub, as applicable,

                        (2) as to the matters set forth in SECTION 7.2(A) and
                (B), and

                        (3) that (A) each of Seller's and Seller Sub's
               Certificate of Incorporation and Bylaws, attached to the
               certificate, are true and complete, (B) such Certificate of
               Incorporation and Bylaws have been in full force and effect
               in the form attached since the date of the adoption of the
               resolutions referred to in clause (C) below and no amendment to
               such organizational documents has occurred since the date of the
               last amendment annexed thereto, if any, and (C) the resolutions
               adopted by the board of directors or other governing body of
               Seller and Seller Sub (or a committee thereof duly authorized)
               authorizing the execution, delivery and performance of this
               Agreement, attached to the certificate, were duly adopted at a
               duly convened meeting thereof, at which a quorum was present and
               acting throughout or by unanimous written consent, remain in
               full force and effect,and have not been amended, rescinded or
               modified, except to the xtent attached thereto;


                                       24


                   (v) a certificate of good standing in respect of Seller and
          Seller Sub, certified by the Secretary of State of the State of
          Delaware, dated as of a date not more than ten (10) Business Days
          prior to the Closing Date;

                   (vi) subject to SECTION 2.5, assignment and assumption
          agreements or subcontracts, solely to the extent applicable, in form
          and substance reasonably acceptable to the Parties, as are necessary
          to effect the assignment to Purchaser of all rights of Seller, Seller
          Sub and their respective Affiliates in and to the Assigned Contracts
          and Product Intellectual Property;

                   (vii) copies of all third party consents (including consents
          of Governmental Authorities) set forth on SCHEDULE 7.2 of the Seller
          Disclosure Schedule and such other third party consents as have been
          obtained;

                   (viii) a certificate, dated as of the Closing Date, duly
          executed by an authorized officer of Seller certifying compliance with
          SECTION 8.11(A);

                   (ix) an unredacted, fully executed copy of each Assigned
          Contract (including schedules, exhibits and appendices thereto), and
          control over or physical possession of, as applicable, all other
          Purchased Assets, together with such conveyance documents that are
          necessary to vest in Purchaser good and valid title or ownership
          rights to the Purchased Assets and the Inventory and valid contract or
          other rights in the Purchased Assets that are contractual rights;

                   (x) a certificate of each of Seller and Seller Sub, in
          compliance with Treasury Regulation Section 1.1445-2(b)(2), listing
          each of Seller's and Seller Sub's name, address and U.S. employer
          identification number and stating that Seller or Seller Sub, as
          applicable, is not a foreign person; and

                   (xi) such other documents, certificates or instruments as
          the Parties may reasonably agree to deliver or cause to be delivered
          in connection with the consummation of the Transactions, and all other
          related matters, in form and substance reasonably acceptable to the
          Parties.

     Section 3.3   PURCHASER'S ACTIONS AND DELIVERIES.  Purchaser shall deliver
or cause to be delivered to Seller:

                   (i)   the Purchase Price in full by direct wire transfers of
               immediately available funds directly to the Purchase Price Bank
               Account and to the Escrow Account, as set forth in SECTION 2.6;

                   (ii)  executed counterparts of each of the Other Agreements
               to which it is a party;

                   (iii) a letter from Purchaser to the FDA, duly executed by
               Purchaser, agreeing to assume certain obligations with respect to
               the Registrations;

                                       25


                   (iv)  a certificate, dated as of the Closing Date, duly
               executed by an authorized officer of Purchaser, certifying:

                         (1) all persons executing this Agreement, each of the
                    Other Agreements and any other documents delivered pursuant
                    hereto or thereto on behalf of Purchaser are incumbent
                    authorized officers of Purchaser,

                         (2) as to the matters set forth in SECTION 7.3(A) and
                    (B), and

                         (3) (A) Purchaser's Certificate of Incorporation and
                    Bylaws, attached to the certificate, are true and complete,
                    (B) such Certificate of Incorporation and Bylaws have been
                    in full force and effect in the form attached since the date
                    of the adoption of the resolutions referred to in clause (C)
                    below and no amendment to such organizational documents has
                    occurred since the date of the last amendment annexed
                    thereto, if any, and (C) the resolutions adopted by the
                    board of directors of Purchaser (or a committee thereof duly
                    authorized) authorizing the execution, delivery and
                    performance of this Agreement, attached to the certificate,
                    were duly adopted at a duly convened meeting thereof, at
                    which a quorum was present and acting throughout or by
                    unanimous written consent, remain in full force and effect,
                    and have not been amended, rescinded or modified, except to
                    the extent attached thereto;

                    (v)   a certificate of good standing in respect of Eisai
               Inc., certified by the Secretary of State of the State of
               Delaware, dated as of a date not more than ten (10) Business Days
               prior to the Closing Date;

                    (vi)  such instruments of assumption and other instruments
               or documents, in form and substance reasonably acceptable to the
               Parties, as may be necessary to effect Purchaser's assumption of
               the Assumed Liabilities; and

                    (vii) such other documents, certificates or instruments as
               the Parties may reasonably agree to deliver or cause to be
               delivered in connection with the consummation of the
               Transactions, and all other related matters, in form and
               substance reasonably acceptable to the Parties.

                                  ARTICLE IV.
             REPRESENTATIONS AND WARRANTIES OF SELLER AND SELLER SUB

         At the Execution Date and the Effective Time (except as to certain
representations and warranties which expressly speak as of a date certain, which
shall speak as of such date), Seller and Seller Sub, jointly and severally,
represent and warrant to Purchaser as follows:

     Section 4.1   ORGANIZATION. Each of Seller and Seller Sub is a corporation
duly organized, validly existing and in good standing under the Law of Delaware.
Each of Seller and Seller Sub has all requisite corporate power and authority to
own, lease and operate, as applicable, the Product Line Business, the Purchased
Assets and the Inventory, as applicable.

                                       26


     Section 4.2   DUE AUTHORIZATION. Each of Seller and Seller Sub has all
requisite corporate power and authority to execute, deliver and perform its
obligations under this Agreement and the Other Agreements, and the execution and
delivery of this Agreement and the Other Agreements and the performance of all
of its obligations hereunder and thereunder have been duly authorized by Seller
and Seller Sub.

     Section 4.3   NO CONFLICTS; ENFORCEABILITY.

              (a)  The execution, delivery and performance of this Agreement and
the Other Agreements by Seller and Seller Sub (i) are not prohibited or limited
by, and will not result in the breach of or a default under, any provision of
the Certificate of Incorporation or Bylaws of Seller or Seller Sub, (ii)
assuming that all of the consents, approvals, authorizations and permits
described in SECTIONS 4.9 and 4.10 have been obtained and all of the filings and
notifications described in SECTIONS 4.9 and 4.10 have been made and any waiting
periods thereunder have terminated or expired, does not conflict with any Law
applicable to Seller or Seller Sub, and (iii) except as set forth on SCHEDULE
4.3 of the Seller Disclosure Schedule, does not conflict with, result in a
breach of, constitute (with or without due notice or lapse of time or both) a
default under, result in the acceleration of obligations under, create in any
party the right to terminate, modify or cancel, or require any notice, consent
or waiver under, any material Contract binding on Seller or Seller Sub or any
applicable Order of any Governmental Authority to which Seller or Seller Sub is
a party or by which Seller or Seller Sub is bound or to which any of their
respective Assets is subject. Neither execution of this Agreement nor
consummation of the Transactions will trigger any rights of noteholders or the
trustee under the Indenture, dated as of November 26, 2002 (the "INDENTURE"), by
and between Seller and J.P. Morgan Trust Company, National Association, or
rights of Seller's shareholders or the rights agent under the Amended and
Restated Preferred Shares Rights Agreement, dated as of September 13, 1996, as
amended through March 22, 2004 (the "RIGHTS AGREEMENT"), by and between Seller
and Mellon Investor Services LLC, or any Contract or other document related to
the Indenture or the Rights Agreement.

              (b)  This Agreement and the Other Agreements have been duly
executed and delivered by each of Seller and Seller Sub, and constitute the
legal, valid and binding obligations of Seller and Seller Sub, enforceable
against Seller and Seller Sub in accordance with their respective terms, except
as enforceability may be limited or affected by applicable bankruptcy,
insolvency, moratorium, reorganization or other Law of general application
relating to or affecting creditors' rights generally.

     Section 4.4   TITLE; ASSETS.

              (a) Except as set forth on SCHEDULE 4.4 of the Seller Disclosure
Schedule, Seller and Seller Sub have good and valid title or ownership rights to
the Purchased Assets and Inventory, and valid contract or other rights in
Purchased Assets that are contractual rights, and in any case has the right to
use the Purchased Assets and the Inventory, in each case, free and clear of
Encumbrances other than Permitted Encumbrances. Subject to the receipt of the
consents, authorizations, and approvals described in SECTIONS 4.9 and 4.10, upon
consummation of the Transactions, Purchaser will acquire good and valid title or
ownership rights to the Purchased Assets and Inventory, and valid contract or
other rights in the Purchased Assets that

                                       27



are contractual rights, and in any case the right to use the Purchased Assets
and the Inventory, free and clear of all Encumbrances other than Permitted
Encumbrances.

              (b)  The Purchased Assets and the Inventory, together with those
Assets used in the ordinary course of the Product Line Business such as working
capital, employees, those rights licensed pursuant to this Agreement, and
matters covered by the Transition Services Agreement, and such other Assets that
are not uniquely related to the Product Line Business and may be otherwise
commercially acquired such as tangible personal property, office space,
furniture, office equipment and IT services, constitute all of the Assets
necessary to operate the Product Line Business in a manner as has been and is
being conducted by Seller and Seller Sub as of the Closing Date.

     Section 4.5   INVENTORY.

              (a)  As of the Closing Date, the Inventory (i) is good, saleable
and merchantable in the ordinary course of business, (ii) was produced or
manufactured in accordance with the specifications for the Products as set forth
in the Registrations and Good Manufacturing Practices and in material compliance
with applicable Law, (iii) is not adulterated or misbranded and is of suitable
quality, and (iv) may be introduced into interstate commerce in the United
States or, as the case may be, placed on the market or supplied in the
Territory.

              (b)  As of the Closing Date, to the extent the Inventory contains
raw materials and works-in-progress, such raw materials and works-in progress
(i) are of good manufacturing quality, (ii) have not been adulterated or
misbranded, and (iii) have been manufactured, handled, maintained, packaged and
stored at all times in accordance with the specifications set forth in the
relevant Registrations, in compliance with applicable Law and current Good
Manufacturing Practices, and in substantial compliance with all requirements of
relevant Governmental Authorities.

              (c)  Except as set forth in SCHEDULE 4.5(C) of the Seller
Disclosure Schedule, to Seller's Knowledge, in the past twelve (12) months,
Seller, Seller Sub and their respective Affiliates have sold the Products to
wholesalers or distributors only in the ordinary course of business and in
amounts that are generally consistent with past sales by Seller, Seller Sub and
their respective Affiliates to their wholesale and distributor customers during
comparable periods (which, for the avoidance of doubt, shall take into account
seasonality, cyclicality and other market conditions described in Seller's
audited financial statements filed with the SEC).

The foregoing representations and warranties in SECTIONS 4.5(A) and 4.5(B), to
the extent they pertain to the value of the Inventory, shall be subject to
applicable Inventory reserves accrued in accordance with GAAP as of the date
hereof and the Closing Date. The preceding sentence shall not limit the effect
of such representations and warranties other than with respect to the value of
the Inventory.

     Section 4.6   APPLICABLE PERMITS. Schedule 1.1(a) of the Seller Disclosure
Schedule sets forth a true, accurate and complete list of all permits,
approvals, licenses, franchises or authorizations, including the Registrations,
from any Governmental Authority held by Seller, Seller Sub or their respective
Affiliates that relate primarily or exclusively to any Product or the

                                       28



Product Line Business, in each case, together with any renewals, extensions or
modifications thereof or any amendments thereto. Each Applicable Permit is in
full force and effect.

     Section 4.7   INTELLECTUAL PROPERTY.

              (a)  SCHEDULE 1.1 of the Seller Disclosure Schedule sets forth a
true, accurate and complete list of all Intellectual Property (other than trade
secrets, Know-How and goodwill attendant to the Product Intellectual Property
and other Intellectual Property rights not reducible to schedulable form)
primarily or exclusively related to the Products or the Product Line Business,
as follows: (i) SCHEDULE 1.1(D) sets forth a true, accurate and complete list of
those Patents owned by, licensed to or otherwise controlled by Seller, Seller
Sub or any of their respective Affiliates that relate primarily or exclusively
to the manufacture, use or Distribution of the ONTAK Product, (ii) SCHEDULE
1.1(E) sets forth a true, accurate and complete list of those Patents owned by,
licensed to or otherwise controlled by Seller, Seller Sub or any of their
respective Affiliates that relate primarily or exclusively to the manufacture,
use or Distribution of the Panretin Product, (iii) SCHEDULE 1.1(G) sets forth a
true, accurate and complete list of all Copyrights owned by, licensed to or
otherwise controlled by Seller, Seller Sub or any of their respective Affiliates
related primarily or exclusively to the Products or the Product Line Business,
(iv) SCHEDULE 1.1(I) sets forth a true, accurate and complete list of the
Product Marks, (vi) SCHEDULE 1.1(J) sets forth a true, accurate and complete
list of the trade dress, package designs, product inserts, labels, logos and
associated artwork owned by, licensed to or otherwise controlled by Seller,
Seller Sub or any of their respective Affiliates used primarily or exclusively
in connection with any Product or the packaging therefor in the Territory, but
with the exception of the Product Marks, specifically excludes all Seller Brands
used thereon; and (vii) SCHEDULE 1.1(L) sets forth a true, accurate and complete
list of the those Patents owned by, licensed to or otherwise controlled by
Seller, Seller Sub or any of their respective Affiliates that relate primarily
or exclusively to the manufacture, use or Distribution of the Targretin Capsules
Product or the Targretin Gel Product.

              (b)  Except as set forth on SCHEDULE 4.7(B) of the Seller
Disclosure Schedule, (i) the Product Intellectual Property is, to Seller's
Knowledge, enforceable and valid and (ii) none of the Product Intellectual
Property has been or is the subject of (A) any pending Action (including, with
respect to Patents, inventorship challenges, interferences, reissues,
reexaminations and oppositions, and with respect to Trademarks, invalidation,
opposition, cancellation, abandonment or similar Actions) or any Order or other
agreement restricting (x) the use of such Product Intellectual Property in
connection with any Product within the Territory or (y) assignment or license
thereof by Seller, Seller Sub or any of their respective Affiliates, as
applicable, or (B) to Seller's Knowledge, any threatened Action or claim of
infringement threatened or made in writing or any pending Action to which
Seller, Seller Sub or any of their respective Affiliates is a party. SCHEDULE
4.7(B) of the Seller Disclosure Schedule sets forth any and all settlements or
agreements reached with respect to any such Actions related to the Product
Intellectual Property for the three (3)-year period prior to the Closing Date.

              (c)  Except as set forth on SCHEDULE 4.7(C) of the Seller
Disclosure Schedule, all Product Intellectual Property within the Territory is
under the Control of Seller or Seller Sub. Seller, Seller Sub or any of their
respective Affiliates, as applicable, has the unrestricted right to assign,
transfer or grant to Purchaser all rights in and to the Product Intellectual
Property that are

                                       29


being assigned, transferred or granted to Purchaser under this Agreement and the
Other Agreements, in each case free of any rights or claims of any Person or any
other Encumbrances (other than Permitted Encumbrances), and without payment by
any party of any royalties, license fees or other amounts to any other Person;
PROVIDED, HOWEVER, that the existing royalty obligations set forth on SCHEDULE
4.7(D) of the Seller Disclosure Schedule shall continue to be applicable to the
applicable Products manufactured under the Assigned Contracts in accordance with
the terms of such SCHEDULE 4.7(D) of the Seller Disclosure Schedule.

              (d)  SCHEDULE 4.7(D) of the Seller Disclosure Schedule sets forth
a true, accurate and complete list of all royalty, license fee and other payment
obligations applicable as of the Closing Date with respect to the Products.
Other than as set forth on SCHEDULE 4.7(D) of the Seller Disclosure Schedule, no
royalties, license fees or other payment obligations are owed to any Person in
connection with the manufacture, use or Distribution of any Product after the
Closing Date.

              (e)  Except as set forth on SCHEDULE 4.7(E) of the Seller
Disclosure Schedule, or as otherwise contemplated by this Agreement and the
Other Agreements, (i) none of Seller, Seller Sub or any of their respective
Affiliates has assigned, transferred, conveyed, or granted any licenses to the
Product Intellectual Property to third parties within the Territory, or
otherwise caused or permitted any Encumbrance to attach to any Product
Intellectual Property or the Products; (ii) none of Seller, Seller Sub or any of
their respective Affiliates, nor to Seller's Knowledge, any other Person, is
party to any agreements with third parties that materially limit or restrict use
of the Product Intellectual Property within the Territory or require any
payments for their use; (iii) no other Person has any proprietary, commercial,
joint ownership, royalty or other interest in the Product Intellectual Property
or the goodwill associated therewith within the Territory; and (iv) none of
Seller, Seller Sub or any of their respective Affiliates has entered into any
Contract (A) granting any Person the right to bring infringement actions with
respect to, or otherwise to enforce rights with respect to, any of the Product
Intellectual Property, (B) expressly agreeing to indemnify any Person against
any charge of infringement of any of the Product Intellectual Property, or (C)
granting any Person the right to control the prosecution of any of the Product
Intellectual Property. Except for the Permitted Encumbrances, there are no
existing agreements, options, commitments, or rights with, of or to any third
party to acquire or obtain any rights to any of the Product Intellectual
Property.

              (f)  To Seller's Knowledge, there is no unauthorized use,
infringement, misappropriation or violation of any of the Product Intellectual
Property by any Person within the Territory. The conduct of the Product Line
Business in the Territory, as it has been and is now being conducted, does not
presently infringe or misappropriate or otherwise violate, as applicable, the
intellectual property rights or other proprietary rights of any Person and,
except as set forth on SCHEDULE 4.7(F) of the Seller Disclosure Schedule,
neither Seller nor Seller Sub has received any written notice from any Person,
or has Knowledge of, any claim or assertion to the contrary.

              (g) All issuance, renewal, maintenance and other material payments
that are or have become due with respect to the Product Intellectual Property
have been timely paid by or on behalf of Seller or Seller Sub, as applicable.
All documents, certificates and other material in connection with the Product
Intellectual Property have, for the purposes of maintaining such

                                       30


Product Intellectual Property, been filed in a timely manner with the relevant
Governmental Authorities. Seller and Seller Sub (and their respective
Affiliates, as applicable) have properly filed, prosecuted and maintained all
Patents and Trademarks included in the Product Intellectual Property and have
properly filed and maintained all other Product Intellectual Property.

              (h) Seller, Seller Sub and their respective Affiliates have taken
all reasonable measures to maintain in confidence all Product Know-How and to
protect the secrecy, confidentiality and value of all trade secrets included
within the Product Intellectual Property.

              (i) To Seller's Knowledge there are no domain names that consist
of or include the Product Marks that are owned or registered by any Person other
than Seller or Seller Sub or their respective Affiliates.

              (j) Seller, Seller Sub and their respective Affiliates have
complied with all of their obligations pertaining to listing the relevant
Patents pertaining to the Products in the Orange Book and have complied with any
and all of their obligations pursuant to the Bayh-Dole Act with respect to the
Patents pertaining to the Products.

     Section 4.8  LITIGATION. Except as set forth in SCHEDULE 4.8 of the Seller
Disclosure Schedule, there is no Action pending or, to Seller's Knowledge,
threatened, involving Seller, Seller Sub or any of their respective Affiliates
(or to Seller's Knowledge, any third party) related to any Product, the Product
Line Business or the Transactions, except, in each case, as would not,
individually or in the aggregate, reasonably be expected to have a Material
Adverse Effect. None of Seller, Seller Sub or any of their respective Affiliates
is subject to any Order of any Governmental Authority that would materially
impair or delay the ability of Seller or Seller Sub to perform its obligations
hereunder or under any Other Agreement.

    Section 4.9   ASSIGNED CONTRACTS.

              (a) SCHEDULE 1.1(B) of the Seller Disclosure Schedule sets forth a
true, accurate and complete list of each Contract to which Seller, Seller Sub or
any of their respective Affiliates is a party that (i) is material to the
manufacture or Distribution of the Products or the conduct of the Product Line
Business; (ii) provides for aggregate annual payments, or has a value, in excess
of seventy-five thousand dollars ($75,000) and is related to the Products, the
conduct of the Product Line Business, the Purchased Assets or the Inventory; or
(iii) is related to the Products, the conduct of the Product Line Business, the
Purchased Assets or the Inventory and falls within one or more of the following
categories:

                  (i) Contracts under which Seller, Seller Sub or any of their
          respective Affiliates own, have under license, have a right to acquire
          (by option or otherwise), have a right to use or exercise (including
          any covenant not to sue or other similar right of forbearance), or
          otherwise Control, or have any other right or interest in or to any
          Product Intellectual Property;

                  (ii) Contracts with any labor union or similar representative
          covering any Product Employee;

                                       31


                  (iii) Contracts under which the Products are manufactured or
          Distributed by Seller, Seller Sub or any of their respective
          Affiliates, including any Distribution agreements, wholesalers,
          manufacturing and supply agreements and Contracts with managed care
          organizations or Governmental Authorities; and

                  (iv) Contracts limiting or restraining Seller or Seller Sub in
          any material respect from engaging or competing in any lines of
          business with any Person or from purchasing any products, services or
          inventory from any third parties.

              (b) Except as indicated in SCHEDULE 1.1(B) of the Seller
Disclosure Schedule, Seller has delivered or made available to Purchaser's
counsel or in the Data Rooms to Purchaser complete and correct copies of all
Assigned Contracts listed on SCHEDULE 1.1(B) of the Seller Disclosure Schedule
(or required to be listed on such schedule), including all schedules, exhibits,
appendices, amendments, modifications and waivers relating thereto.

              (c) Each Assigned Contract is in full force and effect in
accordance with the terms thereof and constitutes a legal, valid and binding
agreement of Seller, Seller Sub or any of their respective Affiliates, as
applicable, and is enforceable in accordance with its terms by Seller, Seller
Sub or such Affiliate, as applicable, against each counterparty thereto, except
as such enforceability may be limited by bankruptcy, insolvency, reorganization,
moratorium or similar Law relating to or affecting generally the enforcement of
creditors' rights, and the availability of equitable remedies (whether in a
proceeding in equity or at law). Neither Seller nor Seller Sub is in breach,
violation or default (and would not by the lapse of time or the giving of notice
or both, be in default) under any Assigned Contract, except and to the extent to
which such breach, violation or default has not or would not, individually or in
the aggregate, reasonably expected to have a Material Adverse Effect. To
Seller's Knowledge, no other party to any Assigned Contract is in material
breach of or default (and would not by the lapse of time or the giving of notice
or both, be in default) under such Assigned Contract.

              (d) Neither Seller nor Seller Sub has any Knowledge that any party
to any Assigned Contract listed on SCHEDULE 1.1(B) of the Seller Disclosure
Schedule (or required to be listed on such schedule) (i) intends to either
terminate or not renew such Assigned Contract, or (ii) has or intends to submit
to Seller, Seller Sub or any of their respective Affiliates any claim of
material breach by any such party with respect to the performance of its
obligations under any such Assigned Contract.

              (e) SCHEDULE 4.9 of the Seller Disclosure Schedule sets forth a
true, accurate and complete list of the Assigned Contracts for which third party
consents are required to assign such Assigned Contracts to Purchaser. Subject to
the receipt of the third party consents listed on SCHEDULE 4.9 of the Seller
Disclosure Schedule and Closing, Purchaser will succeed to all rights, title and
interests of Seller, Seller Sub or their respective Affiliates under each
Assigned Contract without the necessity to obtain the consent of any other
Person(s) to the assignment of such Assigned Contract.

                                       32



              (f)  None of the Assigned Contracts have been entered into by
Seller, Seller Sub or any of their respective Affiliates other than in the
ordinary course of its or their business and other than on an arm's length
basis.

     Section 4.10  CONSENTS. Except for the requisite filings under the HSR Act
and the expiration or termination of the waiting period thereunder, and all of
the filings and other actions set forth on SCHEDULE 4.9 of the Seller Disclosure
Schedule, other than as set forth on SCHEDULE 4.10 of the Seller Disclosure
Schedule, and subject to SECTION 2.5(B), no material notice to, filing with,
authorization of, exemption by, or consent of, any Person, including any
Governmental Authority, including any foreign Governmental Authority, is
required for Seller or Seller Sub to transfer the Purchased Assets or the
Inventory to Purchaser and otherwise consummate the Transactions.

     Section 4.11  TAXES. All income and other material Tax Returns required to
be filed by or with respect to Seller or Seller Sub have been filed with the
appropriate Governmental Authority, and Seller and Seller Sub have paid all
Taxes due whether or not shown or required to be shown on any Tax Return. The
unpaid Taxes of Seller and Seller Sub have been adequately reserved for, as
determined in accordance with GAAP. There are no liens for Taxes (other than
liens for current Taxes not yet due and payable) on the Purchased Assets or the
Inventory.

     Section 4.12  EMPLOYEE MATTERS.

              (a)  PRODUCT EMPLOYEES. No later than thirty (30) days prior to
the Closing Date, Seller shall deliver a true and complete list (the "PRODUCT
EMPLOYEE LIST"), which shall be appended hereto as SCHEDULE 4.12(A) of the
Seller Disclosure Schedule, of (i) each Product Employee as of the Effective
Time, including position or job title; salary or wage rate; commissions, bonus
compensation and incentive compensation for the past three fiscal years; site of
employment; years (including partial years) of service with Seller, Seller Sub
or any of their respective Affiliates, as applicable; county or city of
residence; accrued leave; severance or stay bonus obligation; whether such
Product Employee is actively at work or on a paid or unpaid leave of absence;
whether such Product Employee is covered by any Seller Plans; and whether such
Product Employee has had his or her work hours reduced in the six (6)-months
prior to the Effective Time; (ii) each person who is not a Product Employee at
the Effective Time but was a Product Employee at any time during the six
(6)-month period preceding the Effective Time, including the date of his or her
employment loss; and (iii) all Contracts (including employment and consulting
agreements) between Seller, Seller Sub or any of their respective Affiliates, as
applicable, and any Product Employee with respect to the Product Line Business
and shall provide Purchaser with copies of such contracts in effect as of the
Effective Time. No Product Employee is a party to, or is otherwise bound by, any
Contract, including any confidentiality, non-competition, retention, proprietary
rights agreement or similar Contract, between such Product Employee and Seller,
Seller Sub or any of their respective Affiliates, as applicable, that would
affect the performance of his or her duties as an employee of Purchaser if
employed by Purchaser pursuant to the provisions of SECTION 9.1(A), or would
require Purchaser to satisfy any financial obligation to such Product Employee
arising out of the termination of such Product Employee's employment with
Seller, Seller Sub or any of their respective Affiliates, as applicable.

                                       33



              (b)  PLANS AND MATERIAL DOCUMENTS. SCHEDULE 4.12(B) of the Seller
Disclosure Schedule lists all material Seller Plans. Seller has made available
to Purchaser a true and complete copy of each Seller Plan, the summary
description for each Seller Plan and the latest annual report, if any, filed
with the IRS for each Seller Plan.

              (c)  Neither Seller nor any ERISA Affiliate of Seller has ever
established, maintained or contributed to, or had an obligation to maintain or
contribute to, any Plan that is subject to Title IV of ERISA.

              (d)  NO MULTIEMPLOYER PLANS. No Seller Plan constitutes a
Multiemployer Plan, and neither Seller nor any of its ERISA Affiliates has ever
contributed to, been required to contribute to, or otherwise had any obligation
or liability in connection with any Multiemployer Plan.

              (e)  COMPLIANCE. Each Seller Plan has been operated in all
material respects in accordance with its terms and the requirements of all
applicable Law. Each of Seller, Seller Sub and each of their respective
Affiliates has performed all material obligations required to be performed by it
under, is not in any material respect in default under or in material violation
of, and Seller has no Knowledge of any material default or violation by any
party to, any Seller Plan or applicable Law. To Seller's Knowledge, there has
been no prohibited transaction within the meaning of Section 4975 of the Code
and Section 406 of Title I of ERISA with respect to any Seller Plan.

              (f)  QUALIFICATION OF CERTAIN PLANS. Each Seller Plan that is
intended to be qualified under Section 401(a) of the Code or Section 401(k) of
the Code has timely received a favorable determination or opinion letter from
the IRS covering all of the provisions applicable to the Seller Plan for which
determination or opinion letters are currently available that the Seller Plan is
so qualified and no fact or event has occurred since the date of such
determination or opinion letter or letters from the IRS which could reasonably
be expected to adversely affect the qualified status of any such Seller Plan or
the exempt status of any such trust. Seller has provided Purchaser with a true
and complete copy of each of such determination or opinion letters.

              (g)  NO LIABILITIES TO PRODUCT EMPLOYEES. Except as set forth on
SCHEDULE 4.12(G), the consummation of the Transactions do not and will not (i)
entitle any Product Employee to severance pay, pension payments or termination
benefits for which Purchaser or any of its Affiliates may become liable; (ii)
accelerate the time of payment or vesting, or increase the amount of
compensation due to any such Product Employee or former employee of Seller,
Seller Sub or any of their respective Affiliates for which Purchaser or any of
its Affiliates may become liable; or (iii) obligate Purchaser or any of its
Affiliates to pay or otherwise be liable for any compensation, vacation days,
pension contribution or other benefits to any Product Employee or former
employee, consultant or agent of Seller, Seller Sub or any of their respective
Affiliates with respect to the Product Line Business for periods prior to the
Closing Date or for personnel whom Purchaser does not actually employ.

      Section 4.13 LABOR MATTERS. Except as disclosed in Schedule 4.13, with
respect to the Product Line Business (a) there is, and within the last five (5)
years has been, no representation

                                       34


of the Product Employees, or former employees of Seller, Seller Sub or any of
their respective Affiliates within the Product Line Business, by any labor
organization and, to Seller's Knowledge, there are no union organizing
activities among the Product Employees, and (b) there currently is not, and
within the last five years has not been, any labor strike, dispute, slowdown,
stoppage or lockout pending, affecting, or threatened against Seller, Seller Sub
or any of their respective Affiliates.

     Section 4.14  COMPLIANCE WITH LAW. Except for the matters set forth under
SCHEDULE 4.14 of the Seller Disclosure Schedule, SECTION 4.5(A)(II) and
(B)(III), and with respect to certain regulatory matters as addressed in SECTION
4.15, (a) each of Seller and Seller Sub is in material compliance with all
applicable Law relating to any Product, the Purchased Assets and the Inventory;
and (b) Seller and Seller Sub have conducted the Product Line Business in
material compliance with all applicable Laws.

     Section 4.15  REGULATORY MATTERS.

              (a)  SCHEDULE 4.15 of the Seller Disclosure Schedule sets forth a
true, accurate and complete list of (i) all material Registrations held by
Seller, Seller Sub or any of their respective Affiliates or under which Seller,
Seller Sub or any of their respective Affiliates conducts business, or notified
or submitted by or on behalf of Seller, Seller Sub, relating to the conduct of
research in respect of, and the manufacture, use or Distribution of, the
Products on or prior to the Execution Date, and (ii) all applications or
notifications or submissions for Registrations pending as of the Execution Date.
Except as otherwise set forth on SCHEDULE 4.15 of the Seller Disclosure
Schedule, either Seller or Seller Sub is the sole and exclusive owner of the
Registrations. Each such Registration (A) has been validly issued or
acknowledged by the appropriate Governmental Authority and is in full force and
effect, and (B) to the extent permitted by applicable Law, is transferable to
Purchaser.

              (b)  To Seller's Knowledge, (i) the manufacture, use or
Distribution of any Product by Seller, Seller Sub or any of their respective
Affiliates in the Territory has been conducted in compliance with the
Registrations and all applicable Law, and (ii) no Governmental Authority has
commenced or threatened to initiate any Action alleging, or which has otherwise
alleged, any violations of any federal, state or local or any payor "fraud and
abuse," consumer protection and false claims statutes and regulations, including
the Medicare and State Health Programs Anti-Fraud and Abuse Amendments of the
Social Security Act (42 U.S.C. ss. 1320a-7b(b)), the PDM Act, or any pricing or
rebate reporting requirements or to seek exclusion, whether voluntary or
otherwise, of Seller, Seller Sub or any Product Employee from participation in
any federally or state-funded program except, in each case, as would not,
individually or in the aggregate, reasonably expected to have a Material Adverse
Effect.

              (c)  No Governmental Authority has notified Seller or Seller Sub
that the conduct of the Product Line Business, the Purchased Assets or the
Inventory are in violation of any Law or the subject of any investigation.
Neither Seller nor Seller Sub has received notice from any Governmental
Authority that there are any circumstances currently existing which would
reasonably be expected to lead to: (i) any loss of or refusal to renew any
Registrations relating to the Product or the Purchased Assets, (ii) renewal on
terms less advantageous to Seller, Seller Sub or any of their respective
Affiliates than the terms of those Registrations currently in

                                       35


force, (iii) recall of any of the Products, or (iv) an action to enjoin
production of any Product at any facility in the Territory.

              (d)  Seller and Seller Sub have completed and filed all material
annual or other material reports required by the FDA or other Medical Product
Regulatory Authority in order to maintain the Registrations.

              (e)  Seller has delivered to Purchaser copies of all material (i)
reports of FDA Form 483 inspection observations, or any equivalent report by
inspectors or officials from any other Governmental Authority of any situation
requiring attention or correction or of conditions or circumstances that are
objectionable or otherwise in contrary to applicable Law, (ii) FDA Notices of
Adverse Findings or any equivalent correspondence, notice or communication from
any other Governmental Authority indicating a failure to comply with applicable
Law or other requirements, (iii) establishment inspection reports, (iv) warning
letters and (v) other documents that assert ongoing lack of compliance in any
material respect with any applicable Law or regulatory requirements (including
those of the FDA), in each case received by Seller or Seller Sub from the FDA or
any other Governmental Authority relating to the Products or arising out of the
conduct of Seller and Seller Sub's business.

              (f)  Seller, Seller Sub and their respective Affiliates have
conducted all clinical trials for the Products in all material respects in
accordance with then-current Good Clinical Practices. Each of Seller, Seller Sub
and each of their respective Affiliates has made all necessary material filings
and received all necessary material approvals and consents for the conduct of
such clinical trials from the necessary Governmental Authorities and neither
Seller nor Seller Sub is aware of any Actions threatened or taken by such
Governmental Authorities to suspend or terminate any ongoing clinical trials for
the Products. Neither Seller nor Seller Sub has received any notice, charge,
subpoena or other request for information, which has not been complied with or
withdrawn, by a Governmental Authority asserting any material breach of the
conditions for approval of any ongoing clinical trials. Seller and Seller Sub
and their respective Affiliates have conducted all clinical trials for the
Products pursuant to valid protocols.

              (g)  None of Seller or Seller Sub, any of the Product Employees
that has conducted or is conducting clinical trials relating to the Products has
been disqualified, debarred or voluntarily excluded by the FDA or any other
Governmental Authority for any purpose, or has been charged with or convicted
under United States federal Law for conduct relating to the development or
approval, or otherwise relating to the regulation, of any drug product under the
Generic Drug Enforcement Act of 1992, the Act or any other relevant Law. To
Seller's Knowledge neither Seller nor Seller Sub nor any of the Product Employee
has made an untrue statement of a material fact to any Governmental Authority
with respect to the Products (whether in any submission to such Governmental
Authority or otherwise), or failed to disclose a material fact required to be
disclosed to any Governmental Authority with respect to the Products. None of
Seller, Seller Sub or any Product Employee has received any notice to such
effect.

              (h)  Any and all Products in their finished form sold on or prior
to the Closing Date were manufactured in all material respects in accordance
with then-current Good Manufacturing Practices and in compliance with the
applicable specifications of the Products as defined in the Registrations.

                                       36


              (i)  Prior to the Effective Time, Seller, Seller Sub and their
respective Affiliates have used all Promotional Materials and conducted all
promotional activities with respect to the Products in material compliance with
all applicable Law.

     Section 4.16  GOVERNMENT MULTI-PRODUCT CONTRACTS. Seller has made available
to Purchaser true, complete and correct copies of all Government Multi-Product
Contracts, PROVIDED that such copies may be redacted to prevent disclosure of
information related to a product other than a Product.

     Section 4.17  FINANCIAL STATEMENTS; NO UNDISCLOSED LIABILITIES. Each of the
consolidated financial statements (including, in each case, any notes thereto)
contained in Seller's SEC Filings (as amended, supplemented or restated, if
applicable the "FINANCIAL STATEMENTS"), to the extent they disclose financial
information directly or primarily related to the Product Line Business, was
prepared, except as may be indicated in such filings and, in the case of
unaudited quarterly financial statements, as permitted by Form 10-Q under the
Exchange Act, in accordance with GAAP applied on a consistent basis during the
periods indicated, and each, as amended, supplemented or restated, if
applicable, presented fairly, in all material respects, the consolidated
financial position of Seller as of the respective dates thereof and the
consolidated results of operations and cash flows of Seller for the respective
periods indicated therein (subject, in the case of unaudited statements, to
adjustments of a normal and recurring type which, individually or in the
aggregate, are not reasonably expected to have a Material Adverse Effect). There
are no Liabilities of Seller or its consolidated subsidiaries directly or
indirectly related to the Product Line Business or the Purchased Assets and the
Inventory of any kind whatsoever, whether accrued, fixed, absolute, contingent,
known, unknown, determined, determinable or otherwise (and whether due or to
become due), of a nature required by GAAP to be reflected in financial
statements other than (i) liabilities disclosed or provided for in the Financial
Statements and (ii) current liabilities and obligations incurred in the ordinary
course of business and consistent with past practice since December 31, 2005
(the "FINANCIAL STATEMENT DATE") that, individually or in the aggregate, are not
reasonably expected to have a Material Adverse Effect.

     Section 4.18  ABSENCE OF CHANGES. Since the Financial Statement Date,
Seller and Seller Sub have operated the Product Line Business in the ordinary
course of business and consistent with past practice, and, except as set forth
in SCHEDULE 4.18 of the Seller Disclosure Schedule:

              (a)  there has not been any Material Adverse Effect;

              (b)  none of Seller, Seller Sub or any of their respective
Affiliates has (i) ceased to own any Assets that would, but for such loss of
ownership, have been included in the Purchased Assets (except for sales of
Inventory and disposition of Promotional Materials), (ii) terminated, amended
any material term of or waived any material right under any Assigned Contract or
under any other Contract that would, but for such termination, amendment or
waiver, have been included in Assigned Contracts, (iii) waived, released,
granted, licensed or transferred any right, title or interest in or to any
Purchased Assets or any other Asset that would, but for such waiver, release,
grant, license or transfer, have been included in Purchased Assets, (iv) caused
or assented to the creation or other incurrence of any Encumbrance (other than a

                                       37


Permitted Encumbrance) on any Purchased Asset or item of Inventory; or (v)
agreed to do any of the foregoing;

              (c)  except in connection with annual job reviews and related
compensation adjustments and bonus allocations (to the extent applicable and
occurring in the ordinary course of business and consistent with past
practices), none of Seller, Seller Sub or any of their respective Affiliates has
made any material change in the terms and conditions of the employment of any
Product Employee;

              (d)  Seller and Seller Sub have maintained all Applicable Permits
and pricing
information contained in the Product Records in the ordinary course of business;

              (e)  none of Seller, Seller Sub or any of their respective
Affiliates has instituted, settled or agreed to settle any Action related to the
Products or the Product Line Business;

              (f)  none of Seller, Seller Sub or any of their respective
Affiliates has taken any write-down of the value of any Purchased Asset or the
Inventory or any portion thereof; and

              (g)  no permit, approval, license, concession, franchise or
authorization has been cancelled, become delinquent or been lost that otherwise
would have been an Applicable Permit.

     Section 4.19  INSURANCE. Schedule 4.19 of the Seller Disclosure Schedule
contains a complete and correct list of all material policies of insurance
maintained by Seller or Seller Sub and related to the Product Line Business.
All such policies are in full force and effect. Neither Seller nor Seller Sub
is in default under any provision contained in any such insurance policy
relating to the Products or the Product Line Business which would have a
material adverse effect upon the ability of the insured to collect insurance
proceeds under such policy. Neither Seller nor Seller Sub has received written
notice of cancellation or non-renewal with respect to any such policy. Except as
set forth on Schedule 4.8 of the Seller Disclosure Schedule, no claim related
to the Products or the Product Line Business exists under any insurance policy
set forth on Schedule 4.19 of the Seller Disclosure Schedule.

     Section 4.20  BROKERS, ETC. No broker, investment banker, agent, finder or
other intermediary acting on behalf of Seller or Seller Sub or under the
authority of Seller or Seller Sub, except for UBS Securities LLC, whose fees
shall be paid by Seller and Seller Sub, is or will be entitled to any broker's
or finder's fee or any other commission or similar fee directly or indirectly in
connection with any of the Transactions.

     Section 4.21  PRODUCT EQUIPMENT. Schedule 1.1(h) of the Seller Disclosure
Schedule sets forth a true, accurate and complete list of the manufacturing
tools, storage devices and test equipment owned by Seller, Seller Sub or any of
their respective Affiliates and used primarily or exclusively by Seller, Seller
Sub or any of their Affiliates to manufacture, store or test one or more
Products.

     Section 4.22  PROMOTIONAL MATERIALS. Schedule 1.1(k) of the Seller
Disclosure Schedule sets forth a true, accurate and complete list of the
Labeling, Product informational letters, and the

                                       38


advertising, promotional and media materials, sales training materials
(including any related outlines and quizzes/answers, if any), trade show
materials (including displays and trade show booths) and videos, including
materials containing post-marketing clinical data, if any, owned by Seller or
Seller Sub and used primarily or exclusively for the commercialization of any
Product in the Territory (including Distribution and sales promotion
information, market research studies and toll-free telephone numbers), and that
Seller, Seller Sub or any of their respective Affiliates has utilized in
connection with, the Product Line Business in the six (6) months prior to the
Execution Date.

     Section 4.23  NO OTHER WARRANTIES. EXCEPT FOR THE REPRESENTATIONS AND
WARRANTIES EXPRESSLY SET FORTH IN THIS AGREEMENT, THE OTHER AGREEMENTS AND THE
SELLER DISCLOSURE SCHEDULE, SELLER AND SELLER SUB DISCLAIM ALL OTHER
REPRESENTATIONS AND WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD TO THE SUBJECT
MATTER OF THIS AGREEMENT, INCLUDING WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NON-INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS.

                                   ARTICLE V.
          REPRESENTATIONS AND WARRANTIES OF EISAI INC. AND EISAI, LTD.

     At the Execution Date and the Effective Time (except as to certain
representations and warranties which expressly speak as of a date certain, which
shall speak as of such date), Eisai Inc. and Eisai, Ltd. represent and warrant
to Seller and Seller Sub as follows:

     Section 5.1  ORGANIZATION. Eisai Inc. is a corporation duly organized and
validly existing and in good standing under the Law of the State of Delaware.
Eisai, Ltd. is a corporation duly organized and validly existing and in good
standing under the Laws of Japan. Each of Eisai Inc. and Eisai, Ltd. has all
requisite corporate power and authority to own, lease and operate its properties
and to carry on its business as now being conducted.

     Section 5.2  DUE AUTHORIZATION. Each of Eisai Inc. and Eisai, Ltd. has all
requisite corporate power and authority to execute, deliver and perform its
obligations under this Agreement and each of the Other Agreements to which it is
a party, and the execution and delivery of this Agreement and each of the Other
Agreements to which it is a party and the performance of all of its obligations
hereunder and thereunder have been duly authorized by each of Eisai Inc. and
Eisai, Ltd. and, to the extent required by Law, contract or otherwise, its
stockholders.

     Section 5.3  NO CONFLICTS; ENFORCEABILITY. The execution, delivery and
performance of this Agreement and each of the Other Agreements to which it is a
party by Eisai Inc. and Eisai, Ltd. (a) are not prohibited or limited by, and
will not result in the breach of or a default under, any provision of the
certificate of incorporation or bylaws of Eisai Inc., or the organizational
documents of Eisai, Ltd., (b) assuming that all of the consents, approvals,
authorizations and permits described in SECTION 5.5 have been obtained and all
of the filings and notifications described in SECTION 5.5 have been made and any
waiting periods thereunder have terminated or expired, does not conflict with
any Law applicable to either Eisai Inc. or Eisai, Ltd., and (c) does not
conflict with, result in a breach of, constitute (with or without due notice or
lapse of time or

                                       39


both) a default under, result in the acceleration of obligations under, create
in any party the right to terminate, modify or cancel, or require any notice,
consent or waiver under, any material Contract binding on either Eisai Inc. or
Eisai, Ltd. or any applicable Order of any Governmental Authority to which
either Eisai Inc. or Eisai, Ltd. is a party or by which either Eisai Inc. or
Eisai, Ltd. is bound or to which any of its Assets is subject, except for such
prohibition, limitation, default, notice, filing, permit, authorization, consent
or approval which would not prevent or delay consummation by either Eisai Inc.
or Eisai, Ltd. of the Transactions. This Agreement and the Other Agreements have
been duly executed and delivered by Eisai Inc. and Eisai, Ltd., and constitute
the legal, valid and binding obligations of Eisai Inc. and Eisai, Ltd.,
enforceable against Eisai Inc. and Eisai, Ltd. in accordance with their
respective terms, except as enforceability may be limited or affected by
applicable bankruptcy, insolvency, moratorium, reorganization or other Law of
general application relating to or affecting creditors' rights generally.

     Section 5.4  LITIGATION. There is no Action pending or, to Purchaser's
knowledge, threatened, directly or indirectly involving Purchaser (or to
Purchaser's knowledge, any third party) that would prohibit, hinder, delay or
otherwise impair Purchaser's ability to perform its obligations hereunder or
under the Other Agreements, including the assumption of the Assumed Liabilities,
or would affect the legality, validity or enforceability of this Agreement or
the Other Agreements, or prevent or delay the consummation of the Transactions.

     Section 5.5  CONSENTS. Except for the requisite filings under the HSR Act
and the expiration or termination of the waiting period thereunder, FDA and
other applicable foreign and United States regulatory or competition approvals,
and as may be necessary as a result of any facts or circumstances relating
solely to Purchaser, no notice to, filing with, authorization of, exemption by,
or consent of, any Person, including any Governmental Authority, is required for
Purchaser to consummate the Transactions.

     Section 5.6 FINANCING. At the Effective Time, Purchaser has sufficient
immediately available funds to pay, in cash, the Purchase Price and
all other amounts payable pursuant to this Agreement and the Other Agreements or
otherwise necessary to consummate all the Transactions. Upon the consummation of
the Transactions, (a) Eisai Inc. and Eisai, Ltd. will not be insolvent, (b)
Eisai Inc. and Eisai, Ltd. will not be left with unreasonably small capital, (c)
Eisai Inc. and Eisai, Ltd. will not have incurred debts beyond its ability to
pay such debts as they mature, and (d) the capital of Eisai Inc. and Eisai, Ltd.
will not be impaired.

     Section 5.7  BROKERS, ETC. No broker, investment banker, agent, finder or
other intermediary acting on behalf of Purchaser or under the authority of
Purchaser is or will be entitled to any broker's or finder's fee or any other
commission or similar fee directly or indirectly in connection with any of the
Transactions.

     Section 5.8  INDEPENDENT INVESTIGATION. In making the decision to enter
into this Agreement and the Other Agreements and to consummate the Transactions,
other than reliance on the representations, warranties, covenants and
obligations of Seller and Seller Sub set forth in this Agreement, Purchaser has
relied solely on its own independent investigation, review and analysis of the
Purchased Assets, Assumed Liabilities, the Intellectual Property licensed to
Purchaser hereunder, the Products and Product Line Business (including
Purchaser's own

                                       40


estimate and appraisal of the value of the financial condition,
assets, Liabilities, operations and prospects of the Product), which
investigation, review and analysis was done by Purchaser and its Affiliates and
Representatives. Purchaser acknowledges that it and its Representatives have
been provided adequate access to the personnel, properties, premises and records
of the Product Line Business for such purpose.

     Section 5.9  NO OTHER WARRANTIES. EXCEPT FOR THE REPRESENTATIONS AND
WARRANTIES EXPRESSLY SET FORTH IN THIS AGREEMENT, PURCHASER DISCLAIMS ALL OTHER
REPRESENTATIONS AND WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD TO THE SUBJECT
MATTER OF THIS AGREEMENT, INCLUDING WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NON-INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS.

                                  ARTICLE VI.
                           COVENANTS PRIOR TO CLOSING

     Section 6.1  ACCESS TO INFORMATION. Between the Execution Date and the
Closing Date, Seller shall and shall cause Seller Sub to (a) afford Purchaser
and its Representatives access, during regular business hours and upon
reasonable agreed-upon times, to the Data Rooms (which, for the avoidance of
doubt, shall contain at least the materials and information included therein on
March 14 and 15, 2006 with respect to the Data Room established in San Diego,
California, and March 31, April 6 and 7 and July 11 and 12, 2006 with respect to
the Data Room established in New York City, New York), and (b) subject to any
applicable Law and the terms of any Contract, afford Purchaser and its
Representatives access, during regular business hours and upon reasonable
agreed-upon times, to Seller's, Seller Sub's and any of their respective
Affiliates' personnel and properties pertaining to any Product or Product Line
Business, Assigned Contracts, Applicable Permits, the Product Records and all
other information and materials pertaining to the Product Line Business,
PROVIDED that such access shall not unreasonably interfere with Seller's or
Seller Sub's business and operations and shall, at all times, be subject to
applicable legal or other limitations. Such access and information shall not in
any way diminish or otherwise affect any of the representations or warranties
hereunder or Purchaser's rights to indemnification in respect of any breach
thereof.

     Section 6.2  CONDUCT OF THE PRODUCT LINE BUSINESS.

              (a) Between the Execution Date and the Closing Date, except as
otherwise set forth on SCHEDULE 6.2 or as expressly provided for in this
Agreement or consented to in writing by Purchaser, Seller and Seller Sub shall
(and shall cause their respective Affiliates to) use commercially reasonable
efforts to: (i) continue and conduct the Product Line Business in Seller's and
Seller Sub's (and, if applicable, their respective Affiliates') ordinary and
usual course of business and in a manner consistent with past practices (except
where such conduct would conflict with Seller's and Seller Sub's other
obligations under this Agreement or any Other Agreement) and (ii) preserve in
all material respects the Product Line Business, which, for the avoidance of
doubt shall include using commercially reasonable efforts to maintain good
working relationships with all of the prescribers, customers and suppliers of
the Product Line Business.

                                       41



              (b) Between the Execution Date and the Closing Date, unless
otherwise agreed by Purchaser, neither Seller nor Seller Sub shall (and Seller
and Seller Sub shall not permit any of their respective Affiliates to):

                  (i) sell the Products other than in the ordinary course of
          business or in amounts that are inconsistent with sales by Seller and
          Seller Sub (and as applicable, their respective Affiliates) during
          Seller's fiscal quarter ended June 30, 2006;

                  (ii) grant or announce any increase in the salaries, bonuses
          or other benefits payable by Seller or Seller Sub (or their respective
          Affiliates) to any of the Product Employees, other than as required by
          Law, pursuant to any Seller Plan, programs or agreements existing on
          the Execution Date or other ordinary course increases consistent with
          the past practices of Seller and Seller Sub (and, as applicable, their
          respective Affiliates), respectively;

                  (iii) terminate or fail to exercise any rights of renewal with
          respect to any Assigned Contracts set forth on SCHEDULE 1.1(B) of the
          Seller Disclosure Schedule that by its terms would otherwise expire;

                  (iv) settle or compromise any material claims of Seller,
          Seller Sub or their respective Affiliates (to the extent relating to
          any Product or Product Line Business); or

                  (v) enter into any Contract relating in any way to the Product
          Line Business, except to the extent that such Contract is (A) entered
          into in the ordinary course of business and consistent with past
          practice and (B) does not involve Liabilities in excess of fifty
          thousand dollars ($50,000) individually or two hundred fifty thousand
          dollars ($250,000) in the aggregate;

                  (vi) make any capital expenditure or commitment or addition to
          property, plant or equipment of Seller or Seller Sub in respect of the
          Product Line Business or the Purchased Assets, individually or in the
          aggregate, in excess of two hundred fifty thousand dollars ($250,000);

                  (vii) take, or fail to take, any other action that could
          reasonably be expected to result in a breach or inaccuracy in any of
          the representations or warranties of Seller or Seller Sub contained in
          this Agreement;

                  (viii) (A) incur, create, assume or permit the incurrence,
          creation or assumption of any Encumbrance (other than Permitted
          Encumbrances) with respect to the Purchased Assets or the Inventory,
          (B) dispose of any of the Purchased Assets or Inventory, except for
          sales of Inventory and Promotional Materials in the ordinary course of
          business, or (C) waive, release, grant, license or transfer any right,
          title or interest in or to any Purchased Asset or any item of
          Inventory, except in the ordinary course of business;

                                       42


                  (ix) revise or modify any Promotional Materials (including any
          Labeling) except as required by any Governmental Authority or
          applicable Law;

                  (x) except as set forth on SCHEDULE 6.2, terminate any ongoing
          clinical trial (including any post approval study) with respect to any
          Product, except in the event of a safety concern or as otherwise
          necessary to comply with any Governmental Authority or applicable Law;

                  (xi) except as set forth on SCHEDULE 6.2, abandon, cease
          prosecution on, fail to maintain, or fail to pay any fees or expenses
          in connection with, any Patent or pending patent application relating
          to the Product Intellectual Property;

                  (xii) add, remove or otherwise alter any references to the
          Products in any website Controlled by Seller, Seller Sub or any of
          their respective Affiliates or any of the content of such references
          in any such website, except in response to a request by a Governmental
          Authority or as otherwise required by applicable Law (including in
          connection with posting any of Seller's SEC Filings to Seller's
          website); or

                  (xiii) agree to take any of the actions specified in this
          SECTION 6.2, except as contemplated by this Agreement and the Other
          Agreements.

     Section 6.3  REQUIRED APPROVALS AND CONSENTS. As soon as reasonably
practicable, but in any event, no later than ten (10) Business Days after the
Execution Date, the Parties shall make all filings required to be made in order
to consummate the Transactions, including all filings under the HSR Act in
accordance with SECTION 6.4. The Parties shall also cooperate with each other
with respect to all filings that Purchaser elects to make. Seller and Seller Sub
shall use their commercially reasonable efforts to obtain all third party
consents, in accordance with their obligations under SECTION 2.5, subject to
SECTION 2.5(B) and SECTION 8.7, required to effect the assignment of the
Assigned Contracts and Applicable Permits to Purchaser.

     Section 6.4  HSR ACT.

              (a)  If required pursuant to applicable Law, each Party shall file
or cause to be filed as soon as practicable, and in any event no later than ten
(10) Business Days after the Execution Date, any notifications required under
the HSR Act and any comparable filing required by applicable foreign Law. Each
Party shall use commercially reasonable efforts to respond as promptly as
practicable to any inquiries or requests received from any Governmental
Authority in the Territory for additional information or documentation and to
cause the waiting periods under the HSR Act and any applicable foreign Law to
terminate or expire at the earliest possible date after the date of filing. The
Parties shall be responsible for their own legal fees for preparing their
portion of the HSR Act filings, and any filings required by any foreign Law.
Purchaser shall bear the responsibility for any required HSR Act filing fees.

              (b)  The Parties shall cooperate with each other and (i) promptly
prepare and file all necessary documentation, (ii) effect all necessary
applications, notices, petitions and filings and execute all agreements and
documents, and (iii) use commercially reasonable efforts to obtain all necessary
permits, consents, approvals and authorizations of all Governmental

                                       43



Authorities. Purchaser shall have the right to review and approve in advance all
characterizations of the information relating to Purchaser; Seller shall have
the right to review and approve in advance all characterizations of the
information relating to Seller and its Affiliates; and each Party shall have the
right to review and approve in advance all characterizations of the information
relating to the Transactions, in each case which appear in any material filing
made in connection with the Transactions. The Parties agree that they will
consult with each other with respect to the obtaining of all such necessary
permits, consents, approvals and authorizations of all third parties and
Governmental Authorities. Each Party shall (i) promptly notify the other Party
of any communication to that Party or its Affiliates from any Governmental
Authority and, subject to applicable Law, permit the other Party or the other
Party's counsel to review in advance any proposed written communication to any
of the foregoing; (ii) not participate, or permit its Affiliates to participate,
in any substantive meeting or discussion with any Governmental Authority in
respect of any filings, investigation or inquiry concerning this Agreement
unless it consults with the other Party in advance and, to the extent permitted
by such Governmental Authority in the Territory, gives the other Party the
opportunity to attend and participate thereat; and (iii) with the exception of
business documents deemed confidential by the possessing Party (including
documents submitted as attachments to the Party's Notification and Report Form
under the HSR Act), furnish the other Party with copies of all correspondence,
filings, and communication (and memoranda setting forth the substance thereof)
between the Party (its affiliates, and its respective representatives) on the
one hand, and any Governmental Authority or members of their respective staffs
on the other hand, with respect to this Agreement.

              (c)  Except as otherwise expressly set forth in this Agreement,
(i) Purchaser shall not be required to divest any of its respective businesses,
product lines or assets, including any part of the Purchased Assets or Product
Line Business acquired pursuant to the terms and conditions of this Agreement
and the Other Agreements; (ii) Purchaser shall not be required to take or agree
to take any other action or agree to any limitation that could reasonably be
expected to have an adverse effect on the business, operations, assets,
liabilities, condition (financial or otherwise), results of operations or
prospects of Purchaser or its Affiliates; and (iii) Purchaser shall not be
required to waive any of the conditions set forth in ARTICLE VII.

     Section 6.5   NO NEGOTIATION.

              (a)  Between the Execution Date and the Closing Date, Seller and
Seller Sub agree that neither they nor any of their respective Affiliates shall,
and each such Party shall use commercially reasonable efforts to cause their
respective Representatives not to, directly or indirectly, take any action to
(x) solicit, initiate or facilitate any Acquisition Proposal, (y) as to any such
Acquisition Proposal, participate in any way in discussions or negotiations
with, or furnish any non-public information to, any Person that has made an
Acquisition Proposal or (z) enter into any agreement with respect to any
Acquisition Proposal; PROVIDED, however, that, at any time prior to the Closing
Date, Seller and Seller Sub shall be permitted to:

                  (i) participate in any discussions or negotiations with, and
          provide any non-public information to, any Person in response to an
          Acquisition Proposal by any such Person, if the board of directors of
          Seller reasonably determines that

                                       44


          there is a substantial likelihood that such Acquisition Proposal
          would reasonably be expected to lead to a Superior Proposal;

                  (ii) if Seller has received an Acquisition Proposal from a
          third party and the board of directors of Seller reasonably determines
          that such Acquisition Proposal constitutes a Superior Proposal, enter
          into an agreement with respect to such Acquisition Proposal; and

                  (iii) take and disclose to Seller's stockholders a position
          with respect to any tender offer or exchange offer by a third party or
          amend or withdraw such a position in accordance with Rule 14d-9 and
          Rule 14e-2 of the Exchange Act.

              (b) In the event Seller makes a determination to take any of the
actions contemplated under SECTION 6.5(A)(II) with respect to an Acquisition
Proposal, Seller shall notify Purchaser of such determination within twenty-four
(24) hours of making such determination (a "NOTICE OF SUPERIOR PROPOSAL"), which
notification shall state that Seller is prepared to enter into a definitive
agreement as to such Superior Proposal and include a summary of the material
terms and conditions of such Superior Proposal. During the five (5) Business Day
period after Purchaser's receipt of the Notice of Superior Proposal, Purchaser
shall have the right, at its sole and absolute discretion, to make an offer that
Purchaser believes to be at least as favorable to Seller's stockholders as such
Superior Proposal; PROVIDED, that during such five (5) Business Day period,
Seller shall negotiate in good faith with Purchaser (to the extent Purchaser
wishes to negotiate) to enable Purchaser to make, modify and complete a more
favorable offer. Upon receipt of such offer, the board of directors of Seller
shall, within two (2) Business Days, determine in good faith, after consultation
with its financial advisor and legal counsel, as to whether the competing offer
continues to constitute a Superior Proposal relative to Purchaser's final offer;
PROVIDED, that Purchaser acknowledges and agrees that in the event Purchaser
terminates this Agreement pursuant to SECTION 10.1(C)(IV) or Seller terminates
this Agreement pursuant to SECTION 10.1(B)(III), that concurrently with such
termination Seller may enter into a definitive agreement providing for
implementation of such Superior Proposal. For the avoidance of doubt, exceeding
the purchase price offered under the Superior Proposal by any dollar amount
shall not be a condition to any offer by Purchaser made in accordance with this
SECTION 6.5(B) being deemed by Seller's board of directors to be a "more
favorable offer."

     Section 6.6   TRANSITION ACTIVITIES.

              (a)  Between the Execution Date and the Effective Time, Seller and
Seller Sub shall promptly furnish Purchaser with such reasonable sample
quantities of any Promotional Materials that Seller or Seller Sub may have
utilized in connection with the Product Line Business during the six (6)
month-period prior to the Execution Date, for use by Purchaser in preparing its
own Promotional Materials. In that regard, each of Seller and Seller Sub shall
and hereby does grant Purchaser a non-exclusive, non-transferable,
non-sublicensable, royalty free, paid-up license in the Territory to use
Seller's and Seller Sub's Promotional Materials in connection with creating
Purchaser's Promotional Materials for a period of six (6) months following the
Closing Date or three (3) months following completion of the transfer of the
Registrations to Purchaser in accordance with SECTION 8.7(A), whichever is
later. All costs and

                                       45



expenses incurred by Purchaser with respect to creating its own Promotional
Materials shall be borne by Purchaser.

              (b)  Prior to Closing, the Parties shall enter into a Transition
Services Agreement, to be effective immediately after the Effective Time,
providing for the services specified therein pursuant to which Seller and Seller
Sub shall perform certain transitional services for Purchaser in accordance with
the terms thereof.

     Section 6.7   NON-SOLICITATION; NON-COMPETITION; NON-DISPARAGEMENT.

              (a)  LIMITATIONS ON SOLICITATION AND HIRING OF EMPLOYEES.

                  (i) Neither Seller nor Seller Sub shall (and Seller and Seller
              Sub shall not permit any of their respective Affiliates to),
              directly or indirectly, solicit or otherwise attempt to induce any
              Hired Employee to terminate his or her employment with Purchaser
              or its Affiliates for a period of one (1) year following the
              Closing Date; PROVIDED, HOWEVER, that this SECTION 6.7(A)(I) shall
              not (A) prohibit general solicitations of or advertisement for
              employment by Seller if they are not specifically directed at
              Hired Employees or (B) prevent Seller from interviewing or hiring
              any Hired Employee who responds to such general solicitation of or
              advertisement for employment. Subject to the provision in the
              preceding sentence, for such one (1)-year period, neither Seller
              nor Seller Sub shall (and Seller and Seller Sub shall not permit
              any of their respective Affiliates to) directly or indirectly hire
              or enter into any arrangement for the services of any employees
              employed by Purchaser or its Affiliates with any amount of
              responsibility relating to the Products, unless the individual's
              employment has been terminated by Purchaser or its Affiliates.

                  (ii) Purchaser shall not (and shall not permit any of its
              Affiliates to), directly or indirectly, solicit or otherwise
              attempt to induce any employees of Seller or Seller Sub (other
              than the Product Employees, including Potential Employees) to
              terminate his or her employment with Seller or Seller Sub or any
              of their respective Affiliates for a period of one (1) year
              following the Closing Date; PROVIDED, HOWEVER, that this SECTION
              6.7(A)(II) shall not (A) prohibit general solicitations of or
              advertisement for employment by Purchaser if they are not
              specifically directed at Seller's employees, or (B) prevent
              Purchaser from interviewing or hiring any employee of Seller who
              responds to such general solicitation of or advertisement for
              employment. For the avoidance of doubt, notwithstanding the
              foregoing, Purchaser may directly or indirectly solicit or
              otherwise attempt to induce any Product Employee, including a
              Potential Employee, to terminate his or her employment with Seller
              or Seller Sub or any of their respective Affiliates, and Purchaser
              may interview or hire any Product Employee (including Potential
              Employee) of Seller who responds to such solicitation or
              inducement.

              (b) NON-COMPETITION. Seller and Seller Sub agree that during the
period commencing on the day immediately following the Closing Date and ending,
with respect to

                                       46


each Product in each applicable country, on the last day of the applicable
Exclusivity Period, unless acting pursuant hereto or acting with the prior
written consent of Purchaser (which consent may be withheld in Purchaser's sole
discretion), none of Seller, Seller Sub or any of their respective Affiliates
shall, directly or indirectly, (i) market, Distribute or, except as provided in
the Transition Services Agreement, manufacture or cause to be manufactured, in
the Territory any of denileukin difitox, bexarotene or alitretinoin, or any
derivations thereof, as applicable, or any pharmaceutical product containing any
of the foregoing as an active ingredient, or (ii) license or authorize any other
Person to do the same, PROVIDED, HOWEVER, that such provision shall not survive
a change of control of Seller or an acquisition of a third party pharmaceutical
company by Seller or Seller Sub.

              (c) NON-DISPARAGEMENT.

                  (i) For a period of two (2) years following the Closing Date,
              each of Seller and Seller Sub agrees that neither it nor its
              Affiliates shall, except as required by Law, engage in any conduct
              that involves the making or publishing of written or oral
              statements or remarks (including the repetition or distribution of
              derogatory rumors, allegations, negative reports or comments)
              which are disparaging, deleterious or damaging to the integrity
              reputation or goodwill of Purchaser, its Affiliates, the Product
              Line Business or the Products.

                  (ii) For a period of two (2) years following the Closing Date,
              Purchaser agrees that neither it nor its Affiliates shall, except
              as required by Law, engage in any conduct that involves the making
              or publishing of written or oral statements or remarks (including
              the repetition or distribution of derogatory rumors, allegations,
              negative reports or comments) which are disparaging, deleterious
              or damaging to the integrity reputation or goodwill of Seller,
              Seller Sub or any of their respective Affiliates.

              (d)  BLUE PENCIL PROVISIONS. If a court of competent jurisdiction
determines that the foregoing restrictions are too broad or otherwise
unreasonable under applicable Law, including with respect to duration,
geographic scope or space, the court is hereby requested and authorized by the
Parties to revise the foregoing restriction to include the maximum restrictions
allowable under applicable Law. Each of the Parties acknowledges, however, that
this SECTION 6.7 has been negotiated by the Parties and that the geographical
and time limitations on activities, are reasonable in light of the circumstances
pertaining to the Parties.

     Section 6.8  NOTIFICATIONS. Between the Execution Date and the Closing Date
(or any earlier termination of this Agreement), Seller and Seller Sub, on the
one hand, and Purchaser, on the other hand, shall promptly notify the other
Party in writing of any fact, change, condition, circumstance, or occurrence or
nonoccurrence of any event of which it is aware that will or is reasonably
likely to (a) cause any representation or warranty made by such Party in this
Agreement or any Other Agreement to be untrue or inaccurate as of the Execution
Date or as of the Effective Time, or (b) cause a failure to comply with or
satisfy any condition, agreement or obligation required to be complied with or
satisfied by such Party under this Agreement or any Other Agreement; PROVIDED,
HOWEVER, that except as set forth in SECTION 6.9, the delivery of any notice
pursuant to this SECTION 6.8 shall not (x) be deemed to cure any breach of
representation,

                                       47


warranty, agreement or obligation or to satisfy any condition for purposes of
determining whether the conditions set forth in ARTICLE VII have been satisfied,
or (y) limit or otherwise affect the remedies or indemnification rights
available hereunder to the Party receiving such notice.

     Section 6.9   DISCLOSURE SUPPLEMENTS. Between the Execution Date and the
date that is three (3) Business Days prior to the Closing Date, Seller and
Seller Sub shall supplement or amend the Seller Disclosure Schedule with respect
to any matter which, if existing or occurring prior to the Execution Date, would
have been required to be set forth or described in the Seller Disclosure
Schedule or which is necessary to correct any information in such Seller
Disclosure Schedule which has been rendered inaccurate by an event, condition,
fact or circumstance occurring after the Execution Date. Such delivery shall not
affect any rights of Purchaser under SECTION 10.1 or ARTICLE XI. During the same
period, Seller and Seller Sub also shall promptly notify Purchaser of the
occurrence of any breach of any covenant of Seller or Seller Sub in this ARTICLE
VI or the occurrence of any event that may make the satisfaction of the
conditions in ARTICLE VII impossible or unlikely.

     Section 6.10  FURTHER ASSURANCES; FURTHER DOCUMENTS.

              (a)  As of the Execution Date, each of the Parties shall use its
commercially reasonable efforts, in the most expeditious manner practicable, (i)
to satisfy or cause to be satisfied all the conditions precedent that are set
forth in ARTICLE VII, as applicable to each of them, (ii) to cause the
Transactions to be consummated, and (iii) without limiting the generality of the
foregoing, to obtain all consents and authorizations of third parties and to
make all filings with, and give all notices to, third parties that may be
necessary or reasonably required on its part in order to consummate the
Transactions.

              (b)  Each Party shall, and shall cause its respective Affiliates
to, at the request of another Party, execute and deliver to such other Party all
such further instruments, assignments, assurances and other documents as such
other Party may reasonably request in connection with the carrying out of this
Agreement and the Transactions.

                                  ARTICLE VII.
                              CONDITIONS TO CLOSING

     Section 7.1  CONDITIONS PRECEDENT TO OBLIGATIONS OF SELLER, SELLER SUB AND
PURCHASER. The respective obligations of Seller, Seller Sub and Purchaser to
consummate the Transactions on the Closing Date are subject to the satisfaction
or waiver (in accordance with SECTION 12.8) at or prior to the Closing Date of
the following conditions:

              (a) LITIGATION. No preliminary or permanent injunction or other
Order has been issued or instituted by any Governmental Authority, or other body
or authority, which under applicable Law enjoins, restrains, prohibits or makes
illegal to the Transactions on the Closing Date.

              (b) GOVERNMENTAL APPROVALS. Any waiting period (and any extension
thereof) under the HSR Act (or comparable German Law) applicable to the
Transactions has expired or been terminated.

                                       48


              (c) NO ADVERSE LAW. No Law shall have been enacted, entered,
promulgated or enforced by any Governmental Authority that is in effect and has
the effect of (i) making the purchase and sale of the Purchased Assets or the
Inventory illegal or (ii) prohibiting the consummation of the Transactions.

              (d) STOCKHOLDER APPROVAL. If Seller's board of directors
determines in its good faith judgment to seek the approval of Seller's
stockholders to consummate the Transactions, the number of shares of Seller's
Common Stock required to approve the Transactions under Seller's bylaws,
certificate of incorporation or under the Delaware General Corporation Code
shall have been voted in favor of approving the Transactions at a meeting of
Seller's stockholders or by written consent in lieu thereof.

     Section 7.2 CONDITIONS PRECEDENT TO PURCHASER'S OBLIGATIONS. Purchaser's
obligations to consummate the Transactions shall be subject to the fulfillment
of each of the following additional conditions, any one or more of which may be
waived, at Purchaser's sole discretion, in writing by Purchaser:

              (a) REPRESENTATIONS AND WARRANTIES. Each of the representations
and warranties of Seller and Seller Sub contained in ARTICLE IV that are
qualified by materiality shall be true and correct in all respects, and the
representations and warranties of Seller and Seller Sub contained in ARTICLE IV
that are not so qualified shall be true and correct in all material respects, in
each case as of the Execution Date and as of the Effective Time as though made
on and as of the Execution Date and the Effective Time, as applicable (except
that those representations and warranties which address matters only as of a
particular date need only be true and correct as of such date), in each case
after giving effect to any supplement or amendment to the Seller Disclosure
Schedule made pursuant to SECTION 6.9.

              (b) PERFORMANCE. Seller and Seller Sub shall have performed and
complied in all material respects with each of the covenants, agreements and
obligations Seller and Seller Sub are required to perform or comply with under
this Agreement on or before the Closing.

              (c) MATERIAL ADVERSE EFFECT. As of the Closing Date, there shall
have been no Material Adverse Effect.

              (d) REQUIRED CONSENTS. All consents set forth on SCHEDULE 7.2 of
the Seller Disclosure Schedule shall have been obtained or made, as the case may
be.

              (e) NO ADVERSE LAW. No Law shall have been enacted, entered,
promulgated or enforced by any Governmental Authority that is in effect and has
the effect of (i) prohibiting or substantially limiting the ownership,
manufacture, use or Distribution of the Products or the operation by Purchaser
of any material portion of the Product Line Business in a manner as has been
conducted by Seller and Seller Sub immediately prior to the Effective Time or
(ii) compelling or seeking to compel Purchaser to dispose or hold separate any
material portion of Purchaser's business or assets as a result of the
Transactions.

              (f) OTHER DOCUMENTS. Purchaser shall have received the items set
forth in SECTION 3.2(A) and such other documents, certificates or instruments as
the Parties may reasonably agree to deliver or cause to be delivered in
connection with the consummation of the

                                       49


Transactions, and all other related matters, in form and substance reasonably
acceptable to the Parties.

              (g) OTHER AGREEMENTS. Seller and Seller Sub shall have duly
executed and delivered to Purchaser the Other Agreements.

              (h) RELEASE OF ENCUMBRANCES. Purchaser shall have received prior
to the Closing Date, evidence that all Encumbrances (other than Permitted
Encumbrances) on or relating to the Purchased Assets or the Inventory have been
properly terminated or released on or before the Closing, including either (i) a
completed UCC-3 Termination Statement, in a proper form for filing, in respect
of each such Encumbrance or (ii) a payoff letter from the secured party
thereunder, in form and substance reasonably acceptable to Purchaser, certifying
that upon receipt by or on behalf of Seller of the amount specified in such
payoff letter, such Encumbrance shall be released with no further action and
that such secured party will, promptly upon receipt of the specified amount,
deliver to Purchaser a duly executed UCC-3 Termination Statement, in a proper
form for filing, in respect of such Encumbrance.

              (i) INSPECTION OF INVENTORY. Seller shall have permitted Purchaser
and its Representatives (at Purchaser's expense), no later than three (3)
Business Days prior to the Closing Date, to inspect the Inventory.

              (j) SUPPLIER AND CUSTOMER LISTS. Purchaser shall have received at
Closing, true, complete and accurate lists of all of Seller's and Seller Sub's
suppliers and wholesale and retail customers in connection with the Product Line
Business.

     Section 7.3 CONDITIONS PRECEDENT TO SELLER'S AND SELLER SUB'S OBLIGATIONS.
Seller's and Seller Sub's obligation to consummate the Transactions shall be
subject to the fulfillment of each of the following additional conditions, any
one or more of which may be waived, at Seller's sole discretion, in writing by
Seller:

              (a) REPRESENTATIONS AND WARRANTIES. Each of the representations
and warranties of Purchaser contained in ARTICLE V that are qualified by
materiality shall be true and correct in all respects, and the representations
and warranties of Purchaser contained in ARTICLE V that are not so qualified
shall be true and correct in all material respects, in each case as of the
Execution Date and as of the Effective Time as though made on and as of the
Execution Date and the Effective Time, as applicable (except that those
representations and warranties which address matters only as of a particular
date need only be true and correct as of such date).

              (b) PERFORMANCE. Purchaser shall have performed and complied in
all material respects with each of the covenants, agreements and obligations
Purchaser is required to perform or comply with under this Agreement on or
before the Closing.

              (c) OFFICER'S CERTIFICATE. Seller shall have received the items
set forth in SECTION 3.2(B) and such other documents, certificates or
instruments as the Parties may reasonably agree to deliver or cause to be
delivered in connection with the consummation of the Transactions, and all other
related matters, in form and substance reasonably acceptable to the Parties.

                                       50


              (d) OTHER AGREEMENTS. Purchaser shall have duly executed and
delivered the Other Agreements to Seller and Seller Sub, as applicable.

                                 ARTICLE VIII.
                              ADDITIONAL COVENANTS

     Section 8.1 CONFIDENTIALITY; PUBLICITY.

              (a) The terms of the Confidentiality Agreement shall apply to any
information provided to Seller, Seller Sub or Purchaser pursuant to this
Agreement or any Other Agreement or otherwise in connection with the
Transactions. If this Agreement is terminated, the Parties agree to promptly
return to the disclosing Party or (at the disclosing Party's option) destroy any
information of the other Party in its possession that is subject to the
Confidentiality Agreement.

              (b) The Parties shall jointly agree upon the necessity and content
of any press release in connection with the Transactions. Any other publication,
news release or other public announcement by a Party relating to this Agreement
or to the performance hereunder shall first be reviewed and consented to in
writing by the other Parties; PROVIDED, HOWEVER, that notwithstanding any
contrary term contained in the Confidentiality Agreement, (i) any disclosure
that is required by Law as advised by the disclosing Party's counsel may be made
without the prior written consent of the other Parties and (ii) any Party may
issue a press release or public announcement if the contents of such press
release or public announcement have previously been made public other than
through the fault of, or a breach of this Agreement or the Confidentiality
Agreement by, the issuing Party, without the prior written consent of the other
Parties. To the extent practicable, the disclosing Party shall give at least two
(2) Business Days advance notice of any such legally required disclosure to the
other Parties, and such other Parties may provide any comments on the proposed
disclosure during such period and if not practicable, such lesser practicable
period, if any. Notwithstanding any contrary term contained in the
Confidentiality Agreement, to the extent that any Party reasonably determines
that it or any other Party is required to file or register this Agreement, a
summary thereof or a notification thereof to comply with the requirements of an
applicable stock exchange, Exchange regulation, New York Stock Exchange
regulation or any Governmental Authority, including the SEC, such Party shall
give at least two (2) Business Days advance written notice of any such required
disclosure to the other Party. Prior to making any such filing, registration or
notification, the Parties shall consult with respect thereto regarding
confidentiality. The Parties shall cooperate, each at its own expense, in such
filing, registration or notification, including such confidential treatment
request, and shall execute all documents reasonably required in connection
therewith.

     Section 8.2 AVAILABILITY OF RECORDS. After the Closing, Seller and Seller
Sub, on the one hand, and Purchaser, on the other hand, shall make available to
each other Party and its Affiliates and Representatives during regular business
hours and upon reasonable agreed-upon times, all Product Records in its
possession and shall preserve all such information, records and documents until
the later of: (i) six (6) years after the Closing; (ii) the expiration of all
statutes of limitations for assessing or collecting Taxes for periods ending on
or prior to the Closing and periods including the Closing Date, including
extensions thereof applicable to Seller, Seller Sub or Purchaser; or (iii) the
required retention period under any applicable Law for all such information,
records or documents (it being understood that the Parties shall not be required
to

                                       51


provide any Tax returns to any Person, other than as required by applicable
Law). Purchaser and Seller shall also make available to each other during
regular business hours and upon reasonable agreed-upon times (PROVIDED, that
such access shall not unreasonably interfere with such Party's business and
operations), personnel responsible for preparing or maintaining information,
records and documents, in connection with Tax matters, governmental contracts,
litigation or potential litigation, each as it relates to the Product, Product
Line Business, Purchased Assets or Assumed Liabilities prior to the Closing Date
(with respect to Seller) or from and after the Closing Date (with respect to
Purchaser), including product liability and general insurance liability. Each
Party shall bear its own expenses and costs incurred in connection with any
exercise of its rights of inspection under this SECTION 8.2.

     Section 8.3 USE OF SELLER BRANDS. Other than as expressly provided in this
Agreement and the Other Agreements, Purchaser shall not use or permit any of its
Affiliates to use any of the Seller Brands, except as follows:

              (a) To the extent permitted by, and in accordance with applicable
Laws, and subject to the limitations in SECTION 2.5(B) and SECTION 8.7,
Purchaser shall be entitled to continue to use the Seller Brands and the
existing Labeling for the purchased Inventory until the first anniversary of the
Closing Date, it being acknowledged and agreed that Purchaser will use its
commercially reasonable efforts to use or sell such items of Inventory prior to
selling any Product under any Purchaser Trademark. Subject to the terms and
conditions herein, Seller and Seller Sub hereby grant a non-exclusive,
non-transferable right and license to Purchaser to use the Seller Brands on
Labeling and packaging for the Products to the extent specified herein.

              (b) Purchaser shall promptly after the Closing Date, and prior to
the first anniversary of the Closing Date, complete the revision of all
Promotional Materials relating to the Products (i) to delete all references to
the Seller Brands and (ii) to delete all references to Seller's or Seller Sub's
customer service address or phone number; PROVIDED, HOWEVER, that for a period
of ninety (90) days following completion of the transfer of the Registrations to
Purchaser, under the license grant set forth in SECTION 6.6(A), Purchaser may
continue to distribute Promotional Materials that use the Seller Brands and such
Seller and Seller Sub addresses or phone numbers to the extent that such
Promotional Materials exist on the Closing Date.

     Section 8.4 NOTIFICATION OF CUSTOMERS. Promptly after the Closing,
Purchaser shall notify all wholesale distributors of the Products (a) of the
transfer of the Purchased Assets to Purchaser; (b) that all purchase orders for
any Product received by Seller or Seller Sub or any of their respective
Affiliates on or prior to the Closing Date but not shipped prior to 11:59 p.m.
California time on the Closing Date will be transferred to Purchaser (PROVIDED
that to the extent that any purchase order cannot be so transferred, Seller,
Seller Sub and Purchaser shall cooperate with each other to ensure that such
purchase order is filled and that Purchaser receives the same economic benefit
and assumes the same liability associated with filling such purchase order as if
such purchase order had been so transferred); and (c) that all purchase orders
for the Product received, and all Product returns, after the Closing Date should
be sent to Purchaser at Eisai Inc./Research Triangle Park (RTP), 900 Davis
Drive, P.O. Box 14505, Research Triangle Park, NC 27709. Purchaser and Seller
shall agree upon an appropriate notice to wholesalers and commercial customers
with respect to the transfer of chargeback and rebate submissions to Purchaser
effective thirty (30) days after the Closing Date. Upon Purchaser's request,
Seller and

                                       52


Seller Sub shall use commercially reasonable efforts to cooperate
with Purchaser's provision of notices under this SECTION 8.4.

     Section 8.5 PRODUCT RETURNS, REBATES AND CHARGEBACKS.

              (a) NDC NUMBERS. Following the Closing Date, Purchaser shall
obtain its own NDC number and shall use commercially reasonable efforts to have
in place, as soon as reasonably practicable, all resources such that sales can
be accomplished under the NDC number of Purchaser. Thereafter, Purchaser shall
use its new NDC number on all invoices, orders and other communications with
customers and Governmental Authorities.

              (b) PRODUCT RETURNS. Seller shall be financially responsible for
returned Units of Products sold by Seller, Seller Sub or their respective
Affiliates on or before the Closing Date. Purchaser shall be financially
responsible for all returned Units of Products bearing the NDC numbers of Seller
or Seller Sub sold by Purchaser or its Affiliates after the Closing Date and all
returned Units of the Products bearing the NDC numbers of Purchaser or its
Affiliates. All returned Units of Products received by Purchaser, Seller, Seller
Sub or the Affiliates of any Party after the Closing Date will be processed and
handled by such receiving Party (or its Affiliate, if applicable) at its
respective returns handling facility. If either Party accepts returned Units of
a Product for which the other Party is financially responsible in accordance
with this SECTION 8.5(B), that Party shall invoice the other Party for the
amount of such return in accordance with the current returned goods policy of
the Party receiving the returned Product and the associated reasonable cost of
destruction, including payments to any vendors in connection therewith. Each
such invoice shall set forth the number of Units processed, together with such
other information as shall be reasonably necessary to support the invoice. Each
Party shall, within thirty (30) days of its receipt of invoice, pay the other
Party for the full invoiced amount. The receiving Party shall destroy, or cause
to be destroyed, all such returned Product in a manner consistent with
applicable Laws. Notwithstanding any provision herein to the contrary, Purchaser
and its Affiliates shall not take any actions with the intention of encouraging
or otherwise affirmatively causing Seller's and Seller Sub's customers and
distributors to return Products (except as otherwise required by, or deemed
prudent by Purchaser under, applicable Law).

              (c) GOVERNMENT REBATES.

                  (i) Seller shall be financially responsible for all rebates
pursuant to any government rebate programs for all Products bearing the NDC
numbers of Seller or Seller Sub dispensed on or before the one hundred eightieth
(180th) day after the Closing Date (the "REBATE TERMINATION DATE"). Purchaser
shall be financially responsible for all rebates pursuant to any government
rebate programs for all Products bearing the NDC numbers of Seller or Seller Sub
dispensed after the Rebate Termination Date. The Parties acknowledge and agree
that government rebates are currently invoiced on a calendar quarter basis and,
in the event that the Rebate Termination Date is not the last day of a calendar
quarter, Seller shall be financially responsible for the portion of such
government rebates equal to (A) the aggregate amount of all government rebates
invoiced for such calendar quarter, multiplied by (B) a fraction, the numerator
of which is the number of days from and including the first day of such calendar
quarter through and including the Rebate Termination Date and the denominator of
which is the total number of days in such calendar quarter, and Purchaser shall
be responsible for the portion

                                       53


of such government rebates equal to (1) the aggregate amount of all
government rebates invoiced for such calendar quarter, multiplied by (2) a
fraction, the numerator of which is the number of days from and after the Rebate
Termination Date through and including the last day of such calendar quarter and
the denominator of which is the total number of days in such calendar quarter.
For purposes of this SECTION 8.5(C), the Parties acknowledge and agree that
where detailed dispensing information is not readily available, the Product in
question shall be deemed to have been dispensed in the quarter for which it is
invoiced.

                  (ii) Seller shall be administratively responsible for
processing all rebates pursuant to any government rebate programs for all
Product bearing the NDC numbers of Seller or Seller Sub or any of their
respective Affiliates. Purchaser acknowledges that Seller will require certain
information from Purchaser in order to calculate the Medicaid rebate for Product
bearing NDC numbers of Seller or Seller Sub or any of their respective
Affiliates sold by Purchaser after the Closing Date. Accordingly, Purchaser
agrees that, from and after the Closing Date until the date which is one (1)
calendar year after the expiration date of the last lot of Product produced with
any NDC number of Seller, Purchaser will provide to Seller, reasonably in
advance of the date Seller is required to file such information with the
appropriate Governmental Authority, the following information: (a) the Best
Price for each Product identified by NDC number, (b) the AMP for each Product
identified by the NDC number, and (c) any additional data or other information
related to such Medicaid issues reasonably requested by Seller, which shall in
each case shall be prepared in accordance with applicable Laws.

                  (iii) SCHEDULE 8.5(C) sets forth the "BEST PRICE" (as defined
at 42 U.S.C. ss. 1396r-8(c)(1)(C)) and Average Manufacturers Price ("AMP") (as
defined at 42 U.S.C. ss. 1396r-8(k)(1)) reported by Seller for the Product for
the two most recently ended calendar quarters.

                  (iv) To the extent that Seller or Seller Sub processes
government rebate claims for which Purchaser is financially responsible,
Purchaser shall reimburse Seller within thirty (30) days of receipt of invoices
that describe the requested payments in reasonable detail and include reasonable
supporting documentation.

              (d) COMMERCIAL REBATES.

                  (i) Seller shall be financially responsible for all commercial
rebates with respect to Product bearing the NDC numbers of Seller or Seller Sub
dispensed on or before the Rebate Termination Date. Purchaser shall be
financially responsible for all commercial rebates with respect to Product
bearing the NDC numbers of Seller or Seller Sub dispensed after the Rebate
Termination Date. The Parties acknowledge and agree that to the extent that any
commercial rebates are invoiced on a calendar quarter basis, in the event that
the Rebate Termination Date is not the last day of a calendar quarter, Seller
shall be financially responsible for the portion of such commercial rebates
equal to (A) the aggregate amount of all commercial rebates invoiced for such
calendar quarter, multiplied by (B) a fraction, the numerator of which is the
number of days from and including the first day of such calendar quarter through
and including the Rebate Termination Date and the denominator of which is the
total number of days in such calendar quarter, and Purchaser shall be
responsible for the portion of such commercial rebates equal to (1) the
aggregate amount of all commercial rebates invoiced for such calendar

                                       54


quarter, multiplied by (2) a fraction, the numerator of which is the number
of days from and after the Rebate Termination Date through and including the
last day of such calendar quarter and the denominator of which is the total
number of days in such calendar quarter.

                  (ii) Notwithstanding the foregoing, the Parties agree that (i)
neither Seller nor Seller Sub shall be responsible for credits or shelf stock
adjustments to the extent resulting from price decreases initiated by Purchaser
on or after the Closing Date and (ii) any such commercial rebate payments by
Seller or Seller Sub shall be made on the terms and conditions equivalent to
Seller's and Seller Sub's rebate obligations as of the Closing with respect to
each commercial customer as set forth in Seller's and Seller Sub's terms of
agreement with such customer.

                  (iii) To the extent that Seller or Seller Sub processes
commercial rebate claims for which Purchaser is financially responsible,
Purchaser shall reimburse Seller within thirty (30) days of receipt of invoices
that describe the requested payments in reasonable detail and include reasonable
supporting documentation. To the extent that Purchaser processes commercial
rebate claims for which Seller is financially responsible, Seller shall
reimburse Purchaser within thirty (30) days of receipt of invoices that describe
the requested payments in reasonable detail and include reasonable supporting
documentation.

              (e) CHARGEBACK CLAIMS.

                  (i) Seller shall be financially responsible for all chargeback
claims (and associated administrative fees) (the "CHARGEBACK CLAIMS") related to
the Product sold on or prior to the Closing Date. Purchaser shall be financially
responsible for all Chargeback Claims related to the Product sold after the
Closing Date. Notwithstanding the foregoing, the Parties acknowledge that the VA
National Acquisition Center must approve the removal of the Product from
Seller's (and Seller Sub's) Federal Supply Schedule ("FSS") before the
responsibility of processing such rebates is transferred from Seller or Seller
Sub to Purchaser. Until such approval is obtained, Seller (or Seller Sub) shall
continue to be responsible for processing the FSS Chargeback Claims for which
Purchaser is financially responsible on Purchaser's behalf, and Purchaser shall
reimburse Seller for same as set forth below. Purchaser and Seller agree that
(i) Seller's and Seller Sub's financial liability for Chargeback Claims shall be
limited to those commercial customers with which Seller or Seller Sub has
chargeback obligations as of the Closing Date, and (ii) any such Chargeback
Claims issued by Seller or Seller Sub shall be made on terms and conditions
equivalent to Seller's and Seller Sub's obligations as of the Closing with
respect to each customer as set forth in Seller's and Seller Sub's terms of
agreement with such customer as of the Closing Date. Seller shall utilize
records from third party rebate administrators to demonstrate which Chargeback
Claims relate to the Products sold on or prior to the Closing Date for purposes
of determining Seller's obligation.

                  (ii) To the extent that Seller or Seller Sub processes
Chargeback Claims which are the financial responsibility of Purchaser, Purchaser
shall reimburse Seller within thirty (30) days of receipt of invoices that
describe the requested payments in reasonable detail and include reasonable
supporting documentation. To the extent that Purchaser processes Chargeback
Claims which are the financial responsibility of Seller, Seller shall reimburse

                                       55


Purchaser within thirty (30) days of receipt of invoices that describe the
requested payments in reasonable detail and include reasonable supporting
documentation.

     Section 8.6 ACCOUNTS RECEIVABLE. The Parties acknowledge and agree that all
Accounts Receivable shall remain the property of Seller and Seller Sub and their
respective Affiliates and shall be collected by Seller or Seller Sub or their
respective Affiliates subsequent to the Closing. In the event that, subsequent
to the Closing, Purchaser or an Affiliate of Purchaser receives any payments
from any obligor with respect to an Account Receivable outstanding on the
Closing Date, then Purchaser shall, within thirty (30) days of receipt of such
payment, remit the full amount of such payment to Seller. In the case of the
receipt by Purchaser of any payment from any obligor of both Seller or Seller
Sub and Purchaser then, unless otherwise specified by such obligor, such payment
shall be applied first to amounts owed to Purchaser with the excess, if any,
remitted to Seller. In the event that, subsequent to the Closing, Seller or
Seller Sub or any of their respective Affiliates receives any payments from any
obligor with respect to an account receivable of Purchaser for any period after
the Closing Date, then Seller shall, within thirty (30) days of receipt of such
payment, remit the full amount of such payment to Purchaser. In the case of the
receipt by Seller of any payment from any obligor of both Seller or Seller Sub
and Purchaser then, unless otherwise specified by such obligor, such payment
shall be applied first to amounts owed to Seller or Seller Sub with the excess,
if any, remitted to Purchaser.

     Section 8.7  REGULATORY MATTERS.

              (a) TRANSFER OF REGISTRATIONS.

                  (i) At the Effective Time, each of Seller and Seller Sub, as
              applicable, shall (and, as applicable, Seller and Seller Sub shall
              cause their respective Affiliates to) transfer all of the benefit
              of the Registrations to Purchaser free of all Encumbrances, other
              than Permitted Encumbrances, on the terms and conditions set forth
              in this SECTION 8.7, to the extent permitted by, and in accordance
              with applicable Law, and subject to SECTION 2.5(B). As soon as
              practicable following the Closing Date but in any event no later
              than fifteen (15) days after the Closing Date, to the extent
              permitted by, and in accordance with applicable Law, and subject
              to SECTION 2.5(B), Seller shall, and shall cause Seller Sub and,
              as applicable, Seller's and Seller Sub's respective Affiliates to,
              transfer the Registrations to Purchaser. As necessary Seller,
              Seller Sub, and their respective Affiliates shall make such
              amendments to, submit such notifications, reports, correspondence,
              documents or other filings to applicable Governmental Authorities
              in respect of, fulfill such formalities in respect of, and obtain
              any consents and approvals with respect to, such Registrations
              necessary to effect the transfer of each of the Registrations to
              Purchaser. Following the Closing Date, Seller, Seller Sub and any
              of their respective Affiliates, as applicable, shall hold in trust
              for the exclusive benefit of Purchaser those Registrations not yet
              transferred to, or replaced by, Purchaser, and shall maintain such
              Registrations in full force and effect (at the sole cost and
              expense of Purchaser), and shall not amend, cancel or surrender
              any such Registration (except as may have been initiated prior to
              the Execution Date and disclosed to Purchaser in the Seller
              Disclosure Schedule), or

                                       56


              permit any such Registration to expire or be amended,
              cancelled or revoked, unless in each case requested to do so by
              Purchaser.

                  (ii) With respect to all clinical trials (including post
              approval studies) for any Product being conducted as of the
              Closing Date, Seller shall, as soon as practicable, (or shall
              cause Seller Sub to) transfer control to Purchaser or its designee
              of such studies and cooperate with Purchaser to ensure a smooth
              and orderly transition thereof, in a manner that minimizes the
              risk of any disruption of such studies or activities.

                  (iii) Except as otherwise provided in the Transition Services
              Agreement, SECTION 8.5, this SECTION 8.7 and ARTICLE XI, neither
              Seller nor Seller Sub shall have any obligations with respect to
              the transfer of the Registrations to Purchaser and the maintenance
              of the Registrations following the Closing Date.

                  (iv) Upon receipt of the Registrations transferred to
              Purchaser in accordance with this SECTION 8.7, Purchaser promptly
              shall notify the applicable Governmental Authorities of its
              assumption of the Registrations from Seller, Seller Sub and any of
              their respective Affiliates in accordance with applicable Law.

                  (v) Following the Closing Date, Seller or Seller Sub, as
              applicable, shall take or refrain from taking (and each will cause
              its Affiliates to take or refrain from taking) such actions with
              respect to those Registration not yet transferred to, or replaced
              by, Purchaser as are reasonably requested by Purchaser; PROVIDED,
              that Purchaser shall indemnify Seller and Seller Sub for any and
              all Losses arising in connection with any Action by a third party
              arising from, in connection with or otherwise with respect to the
              actions taken or failed to be taken by Seller or Seller Sub at
              Purchaser's request pursuant to this SECTION 8.7(A).

              (b) PURCHASER RESPONSIBILITIES. Except as set forth in the
Transition Services Agreement and subject to the provisions of SECTION 8.5 and
SECTION 8.7(A) above, after the Closing Date, Purchaser (on behalf of Seller or
Seller Sub, to the extent required under applicable Law), at its cost, shall be
solely responsible (subject to Seller's and Seller Sub's obligations set forth
in clauses (c) through (f) below) and liable for (i) taking all actions, paying
all fees and conducting all communication with the appropriate Governmental
Authority required by Law in respect of the Registrations, including preparing
and filing all reports (including adverse drug experience reports) with the
appropriate Governmental Authority (whether the Product is sold before or after
transfer of such Registrations); (ii) taking all actions and conducting all
communication with third parties with respect to Product sold pursuant to such
Registrations (whether sold before or after transfer of such Registrations),
including responding to all complaints in respect thereof, including complaints
related to tampering or contamination; (iii) investigating all complaints and
adverse drug experiences with respect to any Product sold pursuant to such
Registrations (whether sold before or after transfer of such Registrations); and
(iv) fulfilling all other applicable legal and regulatory obligations of a
holder of each Registration.

                                       57


              (c) COMPLAINTS; ADVERSE DRUG EXPERIENCE REPORTS. After the Closing
Date, Seller shall notify Purchaser within seventy-two (72) hours (or such
shorter period required by Law) if Seller, Seller Sub or any of their respective
Affiliates receives a complaint or a report of an adverse drug experience with
respect to any Product. In addition, Seller and Seller Sub shall (and shall
cause their respective Affiliates to) cooperate with Purchaser's reasonable
requests and use commercially reasonable efforts to assist Purchaser in
connection with the investigation of and response to any complaint or adverse
drug experience report related to the Product sold by Seller, Seller Sub or any
of their respective Affiliates. All notifications pursuant to this Section shall
be by fax or email at such numbers (or email addresses) agreed upon by the
Parties' respective safety divisions.

              (d) RECALLS. Except as set forth in the Transition Services
Agreement, after the Closing Date, Purchaser, at its cost (subject to the
proviso below), shall be solely responsible and liable for conducting all
voluntary and involuntary recalls of Units of any Product sold pursuant to such
Registrations (whether sold before or after transfer of such Registrations),
including recalls required by any Governmental Authority and recalls of Units of
any Product sold on or prior to the Closing Date or Product included in
Inventory that was defective when delivered to Purchaser hereunder that are
deemed necessary by Seller in its reasonable discretion; PROVIDED, HOWEVER, that
Seller or Seller Sub shall reimburse Purchaser for the reasonable expenses and
costs of conducting recalls relating to Product sold on or prior to the Closing
Date or Product included in Inventory that was defective when delivered to
Purchaser hereunder, irrespective of whether such recalls were required by
applicable Governmental Authorities or deemed necessary or prudent by Seller,
including the costs of notifying customers, the costs associated with shipment
of such recalled Product, the price paid for such Product, and reasonable
credits extended to customers in connection with the recall. Seller or Seller
Sub promptly shall notify Purchaser in the event that a recall of any Product
sold by Seller, Seller Sub or any of their respective Affiliates on or prior to
the Closing Date or Product included in Inventory that was defective when
delivered to Purchaser hereunder is necessary or otherwise reasonably advisable
and Seller shall, and shall cause Seller Sub to, cooperate with Purchaser's
reasonable requests and use commercially reasonable efforts to assist Purchaser
in implementing and effecting such recall.

              (e) RESPONSE TO MEDICAL INQUIRIES. From the Execution Date until
the Closing, Seller and Seller Sub shall continue to be responsible for
responding to all medical inquiries with respect to any Product in the Territory
in accordance with Seller's or Seller Sub's customary internal procedures for
responding to such inquiries. Seller or Seller Sub shall document all responses
made by it hereunder and shall provide reports thereof on a thirty (30)-day
basis to Purchaser. These Product medical inquiries may arise from many sources
such as (but not limited to) direct telephone calls or written correspondence to
either Party. During the period prior to Closing, Purchaser shall promptly refer
all such Product medical inquiries that it receives to Seller for response in
accordance with Seller's or Seller Sub's customary internal procedures. Except
as set forth in the Transition Services Agreement, after Closing, Purchaser
shall assume all responsibility for responding to any medical inquiries with
respect to any Product; PROVIDED, that Seller and Seller Sub shall reasonably
cooperate with Purchaser in connection with the transfer of responsibility for
responding to responses.

                                       58


              (f) COOPERATION. Seller and Seller Sub shall reasonably cooperate
with Purchaser in supplying information or reasonable assistance in Purchaser's
fulfillment of its obligations under this SECTION 8.7.

     Section 8.8  WEBSITE INFORMATION. Within twenty (20) days after the Closing
Date, Seller shall remove all references to the Products from any website
Controlled by Seller, Seller Sub, or any of their respective Affiliates, except
(i) as necessary to describe the Transactions; (ii) any information contained in
Seller's SEC Filings included on Seller's website; or (iii) as contained in
press releases released prior to the Closing Date and references to the Products
in a historical context; PROVIDED, HOWEVER, during such twenty (20) day period
none of Seller, Seller Sub or any of their respective Affiliates shall add or
alter (other than to remove from the website) any references to the Products in
any website Controlled by Seller, Seller Sub or any of their respective
Affiliates or add to or alter (other than to remove from the website) any of the
content of such references in any such website, except in response to a request
by a Governmental Authority or as otherwise required by applicable Law
(including in connection with posting any of Seller's SEC Filings to Seller's
website).

     Section 8.9  TAX MATTERS.

              (a) All Transfer Taxes shall be borne equally by Seller and
Purchaser; PROVIDED, HOWEVER, that Purchaser and Seller shall reasonably
cooperate with one another to lawfully minimize such Taxes (including, without
limitation, filing claims for refunds of any value added Taxes). Seller and
Purchaser shall also share equally any refunds of Transfer Taxes; PROVIDED,
HOWEVER, that the non-paying party of such Transfer Taxes shall only be entitled
to share equally in such refunds if it has reimbursed the paying party as
provided in this SECTION 8.9. Upon payment of any such Transfer Taxes, the
paying party shall present a statement to the non-paying party setting forth the
amount of the reimbursement to which the paying party is entitled together with
such supporting evidence as is reasonably necessary to calculate the amount to
be reimbursed. The non-paying party shall make such reimbursement promptly but
in no event later than ten (10) Business Days after the presentation of such
statement. Seller, Seller Sub and Purchaser shall cooperate in preparing and
timely filing all Tax Returns and other documentation relating to such Transfer
Taxes (including the determination of the value of the Purchased Assets and
Inventory subject to Transfer Taxes) as may be required by applicable Tax Law.

              (b) Any personal property and similar AD VALOREM Taxes levied with
respect to the Purchased Assets and the Inventory for a taxable period which
includes (but does not end on) the Closing Date (collectively, the "APPORTIONED
OBLIGATIONS") shall be apportioned between Seller and Purchaser based on the
number of days of such taxable period up to and including the Closing Date (such
portion of such taxable period, the "PRE-CLOSING TAX PERIOD") and the number of
days of such taxable period after the Closing Date (such portion of such taxable
period, the "POST-CLOSING TAX PERIOD"). Seller shall be liable for the
proportionate amount of such Apportioned Obligations that is attributable to the
Pre-Closing Tax Period, and Purchaser shall be liable for the proportionate
amount of such Apportioned Obligations that is attributable to the Post-Closing
Tax Period.

                                       59


              (c) Apportioned Obligations and Transfer Taxes shall be timely
paid, and all applicable filings, reports and returns shall be filed, as
provided by applicable Law. The paying party shall be entitled to reimbursement
from the non-paying party in accordance with this SECTION 8.9. Upon payment of
any such Apportioned Obligation or Transfer Tax, the paying party shall present
a statement to the non-paying party setting forth the amount of reimbursement to
which the paying party is entitled under this SECTION 8.9, together with such
supporting evidence as is reasonably necessary to calculate the amount to be
reimbursed. The non-paying party shall make such reimbursement promptly but in
no event later than ten (10) days after the presentation of such statement.

              (d) Seller, Seller Sub and Purchaser hereby waive compliance with
any "bulk sales" Laws (including any requirement to withhold any amount from
payment of the Purchase Price) applicable to the sale to Purchaser of the
Purchased Assets and the Inventory by Seller and Seller Sub.

              (e) Each of Seller and Purchaser shall (i) provide the other with
such assistance as may reasonably be requested by the other Party in connection
with the preparation of any Tax Return, audit or other examination by a
Governmental Authority or any judicial or administrative proceeding related to
Liability for Taxes in connection with the Purchased Assets or the Inventory;
(ii) retain and provide the other Party with any records or other information
that may be relevant to such Tax Return, audit or examination, proceeding or
determination; and (iii) provide the other Party with any final determination of
any such audit or examination, proceeding or determination that affects any
amount required to be shown on any Tax Return of the other Party for any taxable
period.

     Section 8.10 GOVERNMENT MULTI-PRODUCT CONTRACTS. After the Effective Time,
Purchaser shall honor and perform all Liabilities of Seller, Seller Sub and any
of their respective Affiliates arising after the Effective Time under and
pursuant to each Government Multi-Product Contract with respect to supplying any
Products to the applicable party pursuant to such Government Multi-Product
Contract until such time as Seller, Seller Sub or such Affiliate, as applicable,
has terminated each such Government Multi-Product Contract as provided below.
Seller or Seller Sub, as applicable, agree that, except as otherwise required by
applicable Law, after the Effective Time (i) they will not take (or permit any
of their respective Affiliates to take) any action with respect to any
Government Multi-Product Contract that would extend the term of such Government
Multi-Product Contract with respect to the Products, create or agree to any
additional obligations with respect to the Products, or otherwise materially
adversely affect Purchaser or the Product Line Business, without the prior
consent of Purchaser, and (ii) they will take or refrain from taking (and will
cause their respective Affiliates to take or refrain from taking) such actions
with respect to any Government Multi-Product Contract as reasonably requested by
Purchaser; PROVIDED that Purchaser shall indemnify Seller, Seller Sub and their
respective Affiliates for any and all Losses arising in connection with any
Action by a third party arising from, in connection with or otherwise with
respect to the actions taken or failed to be taken by Seller, Seller Sub or any
of their respective Affiliates at Purchaser's request pursuant to this SECTION
8.10. Seller, Seller Sub or any of their respective Affiliates may enter into a
separate agreement with such government party, PROVIDED that such agreements do
not contain any provisions relating to the Products or the Product Line
Business. Seller and Seller Sub, as applicable, shall terminate the rights and
obligations of Seller, Seller Sub or any of their

                                       60


respective Affiliates, as applicable, with respect to the Products under
each such Government Multi-Product Contract, to the extent permitted by the
terms thereof and to the extent permitted by, and in accordance with, applicable
Law, as soon as reasonably practicable after the Effective Time.

     Section 8.11 INVENTORY MATTERS.

              (a) SEGREGATION OF INVENTORY. Prior to the Closing Date, Seller
and Seller Sub shall, and shall cause their respective Affiliates and
subcontractors to, reserve and set aside a single, specific, secure, physical
space for the storage of all the Inventory and shall at all times store and
maintain the Inventory in the designated space and shall not store anything
else, including the products of other third parties, in the designated space,
nor otherwise in any manner co-mingle the Inventory with any property of Seller,
Seller Sub, their respective Affiliates or any other Person other than
Purchaser. The Parties acknowledge and agree that Inventory stored and
maintained in accordance with Good Manufacturing Practices shall meet the
requirements of the first sentence of this SECTION 8.11(A). The records
maintained with respect to such segregated Inventory (which may be computer or
other electronic records) clearly shall indicate that, following the Effective
Time, such Inventory is the property of Purchaser. The Distribution of the
Inventory shall be at Seller's and Seller Sub's expense. After the Closing Date,
Seller and Seller Sub shall hold, Distribute and use the Inventory only in
accordance with the Transition Services Agreement or as otherwise instructed by
Purchaser.

              (b) DESTRUCTION OF EXCESS INVENTORY. Within ten (10) days after
the Closing Date, Seller shall destroy any inventory of bulk active
pharmaceutical ingredient, finished pharmaceutical product, samples of finished
pharmaceutical product and works-in-progress of such pharmaceutical product that
is formulated, labeled or otherwise intended for use, sale or offer for sale
under the Seller Brands related to any Product and owned by Seller, Seller Sub
or any of their respective Affiliates that is not part of the Inventory and
shall deliver to Purchaser a certificate, dated no later than ten (10) days
after the Closing Date, duly executed by an authorized officer of Seller
certifying compliance with this SECTION 8.11(B).

     Section 8.12 PROSECUTION OF PRODUCT MARKS. Following the Execution Date,
Seller shall undertake all commercially reasonable actions to (a) file, or cause
the filing with, and cause the acceptance by the PTO of, the Combined Section 8
and 15 Declarations for the United States Registration for the Trademark
ONTAK(R); and (b) record, or cause the recordation of, the assignment of the
Mexican Registration for the Trademark ONTAK(R) from Eli Lilly & Company to
Seller with the Mexican Trademark Office. Seller shall provide Purchaser
evidence, acceptable to Purchaser in its sole discretion, of the completion of
each such action promptly upon receipt from the relevant Governmental Authority.

     Section 8.13 TRADE SECRETS. Seller shall make available to Purchaser all
trade secrets (if any) included within the Product Intellectual Property
promptly following the Closing and Seller shall, and shall cause Seller Sub and
Seller's and Seller Sub's respective Affiliates to, not use such trade secrets
and maintain the trade secret status of all such trade secrets from and after
the Execution Date unless and until Purchaser ceases to keep such trade secrets
confidential.

                                       61


     Section 8.14 PROFESSIONAL ADVISORY FEES, ETC. Seller will provide for the
transfer, on the Closing Date, to UBS Securities LLC (who is an intended
third-party beneficiary of this paragraph) a cash amount sufficient to pay in
full all amounts due and payable to UBS Securities LLC in connection with the
Transactions.

     Section 8.15 NON-ASSERTION COVENANT. None of Seller, Seller Sub or any of
their respective Affiliates shall assert against Purchaser or any of its
Affiliates, any Intellectual Property rights invented or discovered prior to the
Closing Date and obtained by or Controlled by Seller, Seller Sub or any of their
respective Affiliates prior to or after the Closing Date which would prevent
Purchaser or any of their Affiliates from manufacturing, using or Distributing
the Products. Such covenant not to assert shall be binding on Seller's, Seller
Sub's and their respective Affiliates' successors and assigns and any third
party to whom Seller, Seller Sub, or any of their respective Affiliates licenses
or otherwise transfers rights with respect to any such Intellectual Property
invented or discovered prior to the Closing Date.

                                  ARTICLE IX.
                                EMPLOYEE MATTERS

     Section 9.1  EMPLOYEE TRANSFER.

              (a) Subject to Purchaser's standard hiring requirements (including
but not limited to a background check, drug screening and receipt of a motor
vehicle report), Purchaser shall offer to employ on an at-will basis each of the
Product Employees listed on SCHEDULE 9.1(A)(I), whether such Product Employee is
actively at work or on leave of absence as of the Effective Time; PROVIDED,
HOWEVER, that Purchaser shall only be required to offer employment to those
Product Employees listed on SCHEDULE 9.1(A)(I) who are on a leave of absence at
the Effective Time if they are able to return to work within ninety (90) days
after the Effective Time. For a period of one hundred and twenty (120) days
after the Effective Time, Purchaser may, in its sole discretion, offer to employ
on an at-will basis each of the Product Employees who are listed on SCHEDULE
9.1(A)(II) ("POTENTIAL EMPLOYEES"). Notwithstanding the restrictions under
SECTION 6.7(A), Purchaser shall be permitted to solicit and interview Potential
Employees. Purchaser's employment of Product Employees listed on SCHEDULE
9.1(A)(I) who are actively at work at the Effective Time and who accept such
offer of employment shall commence as of the Effective Time. Purchaser's
employment of Product Employees listed on SCHEDULE 9.1(A)(I) who are not
actively at work at the Effective Time and who accept such offer shall commence
when they return to active work, and such Product Employees shall remain
employees of Seller, Seller Sub or any of their respective Affiliates, as
applicable, until they commence employment with Purchaser. Purchaser shall
deliver the offers of employment required under this SECTION 9.1(A), which may
be contingent upon each Product Employee satisfying Purchaser's standard hiring
requirements, to applicable Product Employees at least ten (10) days prior to
the Closing, PROVIDED that all of the information required to be provided by
Seller pursuant to SECTION 4.12(A) has been provided to Purchaser no later than
five (5) days prior to such date. Each Product Employee, including any Potential
Employee, who becomes employed by Purchaser is herein referred to as a "HIRED
EMPLOYEE." Product Employees listed on SCHEDULE 9.1(A)(I) who are actively at
work as of the Effective Time and who accept Purchaser's offer of employment
shall become Hired Employees as of the Effective Time. Product Employees listed
on SCHEDULE 9.1(A)(I) who are not actively at work as of the Effective Time and
who accept Purchaser's offer

                                       62


of employment shall become Hired Employees when they return to active
work. Potential Employees who are offered employment by the Purchaser and who
accept Purchaser's offer of employment shall become Hired Employees as of their
date of hire. Product Employees who do not accept Purchaser's offers of
employment shall not become Hired Employees. As of the Effective Time (or on the
date of hire by Purchaser in the case of a Product Employee listed on SCHEDULE
9.1(a)(i) not actively employed at the Effective Time or in the case of a
Potential Employee), Seller or Seller Sub shall (or shall cause their respective
Affiliates to) terminate the employment of each Hired Employee who commences
employment with Purchaser.

              (b) As of the Effective Time, all Hired Employees listed on
SCHEDULE 9.1(A)(I) who are actively at work at the Effective Time shall cease
participation in all Seller Plans, subject to the terms of such Plans. Product
Employees listed on SCHEDULE 9.1(A)(I) who are not actively at work as of the
Effective Time shall continue to participate in all applicable Seller Plans,
subject to the terms of such Plans, and shall cease participation in all Seller
Plans when they become Hired Employees, subject to the terms of such Plans.
Potential Employees who become Hired Employees shall cease participation in all
Seller Plans on their date of hire by the Purchaser, subject to the terms of
such Plans.

              (c) Commencing at the Effective Time (or on the date of hire by
Purchaser in the case of a Product Employee not actively employed at the
Effective Time or in the case of a Potential Employee) and ending on the earlier
to occur of the (i) the date that is twelve (12) months from the Effective Time
or the date of hire, as applicable, or (ii) the date on which the Hired Employee
terminates employment with Purchaser, Purchaser shall provide each Hired
Employee with pension and welfare benefits (including medical, dental, vision,
accident, life, disability, vacation and leave and other employee welfare
benefits) that are comparable in the aggregate to those provided to similarly
situated employees of Purchaser.

     Section 9.2  TRANSITION OF BENEFITS.

              (a) Effective as of their date of hire by Purchaser, Hired
Employees who are participants in the Seller Plan that is intended to meet the
requirements of Section 401(k) of the Code (the "SELLER'S 401(K) PLAN") shall
cease to be eligible for any future contributions to Seller's 401(k) Plan except
with respect to compensation from Seller, Seller Sub or any of their respective
Affiliates, as applicable, prior to the Effective Time and as provided under
Seller's 401(k) Plan, and shall be entitled to a distribution of their account
balances under Seller's 401(k) Plan in accordance with such plan and as
permitted by the Code. Hired Employees who receive an eligible rollover
distribution (within the meaning of Section 402(c)(4) of the Code, including a
direct transfer of an eligible rollover distribution within the meaning of
Section 401(a)(31) of the Code) from Seller's 401(k) Plan shall, subject to the
provisions of Section 402 of the Code, be permitted to make a rollover
contribution to a Plan maintained by Purchaser or an Affiliate of Purchaser that
is intended to meet the requirements of Section 401(k) of the Code ("PURCHASER'S
401(K) PLAN"); PROVIDED, HOWEVER, that no outstanding loan amounts or promissory
notes shall be rolled over or transferred to Purchaser's 401(k) Plan.

              (b) Seller or Seller Sub, as applicable, shall (or Seller or
Seller Sub shall cause their applicable Affiliate to), on or before the Closing
Date (or on or before the date of hire by Purchaser in the case of a Product
Employee not actively employed at the Closing Date or a

                                       63


Potential Employee), pay to all Hired Employees any vacation pay benefits
earned but not yet used as of the date on which they terminate employment with
Seller or Seller Sub (or Seller's or Seller Sub's Affiliate), as applicable.
Purchaser shall not recognize, honor or assume the Liability for any Hired
Employee's accrued but unused personal and sick time with Seller, Seller Sub and
their respective Affiliates, but shall credit Hired Employees with years of
service with Seller, Seller Sub or their respective Affiliates, as applicable,
for purposes of calculating their benefits under Purchaser's paid time off
policy; PROVIDED, that any paid time off under Purchaser's paid time off policy
for the year in which a Product Employee becomes a Hired Employee shall be
prorated to reflect the Hired Employee's date of hire by Purchaser.

              (c) As of the Effective Time, Purchaser shall, with respect to (i)
Purchaser's 401(k) Plan, (ii) eligibility, vesting and the contribution
percentage under its money purchase plan, and (iii) other employee benefit
plans, policies, programs or arrangements that contain a service credit
component and that are maintained by Purchaser after the Closing (solely to the
extent applicable to such Hired Employee), credit each Hired Employee with his
or her years of service with Seller, Seller Sub or any of their respective
Affiliates (or any predecessor to any of the foregoing); PROVIDED, that a Hired
Employee's service for Seller, Seller Sub or any of their respective Affiliates
shall not affect the vesting of his benefits, if any, under Purchaser's Long
Term Incentive Plan.

              (d) Hired Employees shall be eligible to enroll in a health plan
determined by Purchaser as of their date of hire by Purchaser without (i) any
waiting periods, (ii) any evidence of insurability, or (iii) application of any
pre-existing physical or mental condition restrictions, except to the extent
that such waiting periods, actively at work requirements, evidence of
insurability or pre-existing mental or physical condition restrictions would
apply under Seller's Plans and be permitted by Law. Seller or Seller Sub (or
Seller's or Seller Sub's Affiliate), as applicable, shall retain responsibility
for and continue to pay all medical and dental plan benefits for each Hired
Employee with respect to claims incurred by such Hired Employee or his or her
covered dependents under the Seller Plans prior to his or her date of hire by
Purchaser. Purchaser shall be responsible for all expenses and benefits with
respect to claims incurred by Hired Employees or their covered dependents on or
after the their date of hire by Purchaser, including, but not limited to,
medical, dental, disability, life insurance and workers' compensation benefits.
Purchaser shall recognize, or cause to be recognized, the dollar amount of all
expenses incurred by each Hired Employee (and his or her eligible dependents)
during the calendar year in which the date of hire by Purchaser occurs for
purposes of satisfying such year's deductible and co-payment limitations and
out-of-pocket maximums under the relevant welfare benefit plans in which such
Hired Employee (and his or her eligible dependents) shall be eligible to
participate after his or her date of hire by Purchaser; PROVIDED, that Seller or
each Hired Employee provides Purchaser with all information reasonably necessary
to credit these expenses.

              (e) Without limiting the generality of SECTION 2.4, Seller, Seller
Sub and their respective Affiliates shall retain sole responsibility for all
Liabilities in respect of continuation coverage of health insurance under
Section 4980B of the Code or Part 6 of Title I of ERISA or other similar state
or local Law to Product Employees and any other current and former employees of
Seller, Seller Sub and their respective Affiliates and their eligible dependents
with respect to "qualifying events" (as defined in Section 4980B of the Code)
occurring prior to their date of hire by Purchaser. Seller shall include in
SCHEDULE 9.2(E), which shall be delivered at

                                       64


Closing, a de-identified list of all qualified beneficiaries within the
meaning of Section 4980B of the Code who are or were Product Employees or are
associated with Product Employees and the beginning and end of the period during
which such qualified beneficiaries are entitled to coverage under Section 4980B
of the Code. Purchaser shall be responsible for satisfying all obligations under
Section 4980B of the Code or Part 6 of Title I of ERISA or other similar state
or local Law with respect to any Hired Employee and his or her eligible
dependents with respect to "qualifying events" occurring on or after the date of
hire by Purchaser. Seller shall continue to maintain a group health plan within
the meaning of Section 4980B of the Code and Part 6 of Title I of ERISA for a
period of at least twelve (12) months after the Closing Date.

              (f) With respect to Hired Employees who participate in a Seller
Plan qualified under Section 125 of the Code ("SELLER'S 125 PLAN") that includes
flexible spending accounts for medical care reimbursements and dependent care
reimbursements ("REIMBURSEMENT ACCOUNTS"), Purchaser shall not assume any
obligations or Liabilities regarding the Reimbursement Accounts. No plan
established or maintained by Purchaser or an Affiliate of Purchaser intended to
qualify under Section 125 of the Code will credit Hired Employees' account
balances for Reimbursement Accounts accrued under Seller's 125 Plan or provide
reimbursement for medical care or dependent care expenses incurred by Hired
Employees at any time during Seller's plan year (including any applicable grace
period) prior to their date of hire by Purchaser (including claims incurred
before their date of hire by Purchaser).

              (g) EMPLOYEE BENEFIT PLANS. Purchaser shall not become the sponsor
of any of Seller Plans.

     Section 9.3  WARN ACT. Purchaser shall be responsible for all Liabilities,
obligations, costs, claims, proceedings and demands, under the WARN Act, or any
state plant closing or notification law, or similar Law in other jurisdictions,
arising out of, or relating to, (i) in respect of Product Employees, the failure
of Purchaser to offer employment to Product Employees listed on SCHEDULE
9.1(A)(I) in accordance with Section 9.1(a), or (ii) in respect of Hired
Employees, any actions taken by Purchaser or their Affiliates on or after the
Closing Date (or date of hire, if later); PROVIDED, HOWEVER, that Purchaser
shall not be responsible for any such Liabilities, obligations, costs, claims,
proceedings and demands to or in respect of any employees of Seller, Seller Sub
or any of their respective Affiliates other than the Product Employees listed on
SCHEDULE 9.1(A)(I). If Seller, Seller Sub or any of their respective Affiliates
does not continue to employ any Product Employees who are not listed on SCHEDULE
9.1(A)(I) and such employment is terminated prior to, at, or within sixty (60)
days following the Effective Time, Seller (or Seller Sub or the applicable
Affiliate) will be responsible for providing any notice to those employees
required by the WARN Act, or any state plant closing or notification Law, or
similar Law in other jurisdictions. Seller and Purchaser will cooperate in good
faith with regard to any notification that may be required by the WARN Act or
any state plant closing or notification law, or similar Law in other
jurisdictions.

     Section 9.4  EMPLOYEE INFORMATION. Following the Execution Date, Seller
shall use commercially reasonable efforts to provide Purchaser with all
information and data reasonably requested by Purchaser in connection with
Purchaser's rights and obligations under this ARTICLE IX, including exchanging
information and data relating to employee benefits and employee benefit plan
coverages (except to the extent prohibited by applicable Law).


                                       65


                                   ARTICLE X.
                              TERM AND TERMINATION

     Section 10.1  TERMINATION.

              (a) This Agreement may be terminated:

                  (i) at any time before the Closing Date by mutual written
              consent of Purchaser and Seller; or

                  (ii) by either Purchaser or Seller, in writing, if the
              Transactions have not been consummated on or before December 31,
              2006 (the "OUTSIDE DATE"), PROVIDED that such failure is not due
              to (A) the failure of the Party seeking to terminate this
              Agreement to perform its obligations under this Agreement or any
              Other Agreement or (B) the failure of Seller to obtain the
              approval of Seller's stockholders to consummate the Transactions,
              in the event Seller's board of directors determines in its good
              faith judgment to seek such approval and such vote has not taken
              place, in which case Seller shall not have the right to terminate
              this Agreement pursuant to this SECTION 10.1(A)(II), and Purchaser
              shall have the right to extend the Outside Date to a date that is
              no more than ten (10) Business Days after the date on which (I)
              Seller's stockholders vote to approve or disapprove Seller's
              consummation of the Transactions or (II) Seller ceases to seek
              such approval; or

                  (iii) by either Purchaser or Seller, in writing, if there
              shall be in effect any Law that prohibits the Closing or if the
              Closing would violate any non-appealable Order.

              (b) This Agreement may be terminated by Seller, in writing, if:

                  (i) (A) any representation or warranty of either Eisai Inc. or
              Eisai Ltd. set forth in this Agreement shall have become untrue or
              Purchaser has breached any covenant or agreement of Purchaser set
              forth in this Agreement, and (B) such breach or misrepresentation
              is not capable of being cured prior to the Outside Date; or

                  (ii) a material breach of any provision of this Agreement has
              been committed by Purchaser, such breach has not been waived by
              Seller and such breach is not cured by Purchaser within ten (10)
              days after written notice thereof; or

                  (iii) subject to and in accordance with Purchaser's rights
              pursuant to SECTION 6.5(B), the board of directors of Seller
              reasonably determines that an Acquisition Proposal is a Superior
              Proposal (with such termination becoming effective upon Seller
              entering into a binding written agreement with respect to such
              Superior Proposal).

              (c) This Agreement may be terminated by Purchaser, in writing, if:

                                       66


                  (i) (A) any representation or warranty of Seller set forth in
              this Agreement shall have become untrue or Seller has breached any
              covenant or agreement of Seller set forth in this Agreement, and
              (B) such breach or misrepresentation is not capable of being cured
              prior to the Outside Date; or

                  (ii) a material breach of any provision of this Agreement has
              been committed by Seller, such breach has not been waived by
              Purchaser and such breach is not cured by Seller within ten (10)
              days after written notice thereof;

                  (iii) Seller amends or supplements the Seller Disclosure
              Schedule pursuant to SECTION 6.9, PROVIDED that Purchaser provides
              Seller notice of termination in accordance with SECTION 10.2(A),
              within five (5) calendar days of receipt of Seller's notice
              delivered in accordance with SECTION 6.9, and such amendment or
              supplement has a Material Adverse Effect;

                  (iv) the board of directors of Seller approves or recommends
              an Acquisition Proposal to the Seller's stockholders or approves
              or recommends that its stockholders tender their shares of
              Seller's Common Stock in any tender offer or exchange offer that
              is an Acquisition Proposal; or

                  (v) the board of directors of Seller determines in its good
              faith judgment to seek the approval of Seller's stockholders to
              consummate the Transactions, and Seller fails to obtain such
              stockholder approval by January 31, 2007.

     Section 10.2 PROCEDURE AND EFFECT OF TERMINATION.

              (a) Upon termination of this Agreement by Seller or Purchaser
pursuant to SECTION 10.1, written notice thereof, indicating the termination
provision in this Agreement claimed to provide a basis for such termination,
shall forthwith be given to the other Party and this Agreement shall terminate.
Nothing in this ARTICLE X shall relieve either Party of any liability for a
breach of this Agreement prior to the termination hereof. Except as provided in
the foregoing sentence, termination of this Agreement shall terminate all
outstanding obligations and liabilities between the Parties arising from this
Agreement except those described in: (i) SECTION 8.1, this ARTICLE X, ARTICLE XI
and ARTICLE XII; (ii) the Confidentiality Agreement; and (iii) any other
provisions of this Agreement which by their nature are intended to survive any
such termination.

              (b) In the event that this Agreement is terminated (i) by Seller
pursuant to SECTION 10.1(B)(III); or (ii) by Purchaser pursuant to SECTION
10.1(C)(IV) or SECTION 10.1(C)(V), then Seller shall on the date that is two (2)
Business Days after such termination, pay to Purchaser a fee equal to Seven
Million Five Hundred Thousand Dollars ($7,500,000) (the "TERMINATION FEE"), by
wire transfer of immediately available funds to an account designated by
Purchaser in writing. Notwithstanding anything to the contrary in this
Agreement, the Termination Fee (A) shall be the exclusive remedy of Purchaser
under circumstances where the Termination Fee is payable by Seller in respect of
a termination in accordance with SECTION 10.1(C)(IV) and (B) together with the
rights granted to Purchaser under SECTION 10.2(F) shall be

                                       67


the exclusive remedy of Purchaser under circumstances where the Termination
Fee is payable by Seller in respect of a termination in accordance with SECTION
10.1(C)(V), and upon payment of the Termination Fee in accordance with this
SECTION 10.2(B), except as otherwise provided in SECTION 10.2(E) and SECTION
10.2(F), Seller shall not have any further liability or obligation relating to
or arising out of this Agreement.

              (c) In the event that this Agreement is terminated by Seller
pursuant to SECTION 10.1(B)(I) or SECTION 10.1(B)(II), Purchaser shall pay to
Seller within two (2) Business Days after the receipt of a notice therefor an
amount equal to Seller's reasonable out-of-pocket expenses in connection with
the negotiation, execution and delivery of this Agreement and the actions taken
in furtherance of the consummation of this Agreement, by wire transfer of
immediately available funds to an account designated by Seller in writing.

              (d) In the event that this Agreement is terminated by Purchaser
pursuant to SECTION 10.1(C)(I), SECTION 10.1(C)(II) or SECTION 10.1(C)(III),
Seller shall pay to Purchaser within two (2) Business Days after the receipt of
a notice therefor an amount equal to Purchaser's reasonable out-of-pocket
expenses in connection with the negotiation, execution and delivery of this
Agreement and the actions taken in furtherance of the consummation of this
Agreement, by wire transfer of immediately available funds to an account
designated by Purchaser in writing.

              (e) As soon as practicable following a termination of this
Agreement, but in no event later than thirty (30) days after such termination,
Purchaser or Seller shall use commercially reasonable efforts, to the extent
practicable, withdraw all filings, applications and other submissions relating
to the Transactions made to any Governmental Authority or other Person.

              (f) In the event that Purchaser terminates this Agreement pursuant
to SECTION 10.1(C)(V), and at any time within the twelve (12) month period
following the termination date Seller determines to enter into a transaction, or
a series of transactions, that if consummated would result in the sale of all or
substantially all of the Products or the Product Line Business (an "ALTERNATIVE
TRANSACTION"), Seller shall notify Purchaser of such determination within two
(2) Business Days of making such determination (an "ALTERNATIVE TRANSACTION
NOTICE"), which notification shall state that Seller is prepared to enter into a
definitive agreement as to such Alternative Transaction and include a summary of
the material terms and conditions of such Alternative Transaction. During the
five (5) Business Day period after Purchaser's receipt of the Alternative
Transaction Notice, Purchaser shall have the right, at its sole and absolute
discretion, to make an offer that Purchaser believes to be at least as favorable
to Seller's stockholders as such Alternative Transaction; PROVIDED, that during
such five (5) Business Day period, Seller shall negotiate in good faith with
Purchaser (to the extent Purchaser wishes to negotiate) to enable Purchaser to
make, modify and complete a more favorable offer; PROVIDED, FURTHER, that upon
receipt of such offer, the board of directors of Seller shall, within two (2)
Business Days, determine in good faith, after consultation with its financial
advisor and legal counsel, as to whether such offer is at least as favorable to
Seller's stockholders as such Alternative Transaction. Purchaser acknowledges
and agrees that in the event that the Parties do not agree upon the material
terms of such a more favorable offer after such five (5) Business Day period,
that Seller may enter into a definitive agreement providing for implementation
of such Alternative Transaction. In the event that Purchaser and Seller
consummate a transaction for the

                                       68


sale of all or substantially all of the Products or the Product Line
Business, Purchaser shall reimburse Seller for all amounts paid by Seller to
Purchaser pursuant to SECTION 10.2(B) upon consummation of such transaction. For
the avoidance of doubt, exceeding the purchase price offered under the
Alternative Transaction by any dollar amount shall not be a condition to any
offer by Purchaser made in accordance with this SECTION 10.2(F) being deemed by
Seller's board of directors to be a "more favorable offer."

                                  ARTICLE XI.
                                 INDEMNIFICATION

     Section 11.1 SURVIVAL OF REPRESENTATIONS AND WARRANTIES; EXPIRATION.

              (a) Notwithstanding any investigation made by or on behalf of
Seller and Seller Sub or Purchaser prior to, on or after the Closing Date, the
representations and warranties contained in this Agreement (including the
Schedules hereto and the Seller Disclosure Schedule) and in any Other Agreement
shall survive the Closing and shall terminate on the first anniversary of the
Closing Date, except that the representations and warranties set forth in:

                  (i) SECTIONS 4.1, 4.2, 4.4(A), 4.20, 5.1, 5.2 and 5.7 shall
              survive forever;

                  (ii) SECTION 4.7 shall survive for eighteen (18) months after
              the Closing Date;

                  (iii) SECTION 4.15(I) shall survive for thirty-six (36) months
              after the Closing Date; and

                  (iv) SECTIONS 4.11 and 4.12 shall survive until the expiration
              of the applicable statute of limitations.

              (b) The covenants, agreements and obligations of the Parties shall
survive until fully performed and discharged, unless otherwise expressly
provided herein.

              (c) Any breach of which would be based upon common law fraud or
intentional misrepresentation with the intent to deceive will survive until the
expiration of the applicable statute of limitations.

              (d) Any right of indemnification or reimbursement pursuant to this
ARTICLE XI with respect to a claimed breach, inaccuracy or non-fulfillment of
any representation, warranty, covenant, agreement or obligation shall expire on
the applicable date of termination of the representation, warranty, covenant,
agreement or obligation claimed to be breached as set forth in SECTION 11.1 (the
"EXPIRATION DATE"), unless on or prior to the applicable Expiration Date, the
Indemnifying Party has received written notice from the Indemnified Party of
such breach, inaccuracy or non-fulfillment (a "CLAIM NOTICE"), describing in
reasonable detail the facts giving rise to any claims for indemnification
hereunder or in the case of a third-party claim, the third-party complaint, and
(if then known) the amount or the method of computation of the amount of such
claim, and a reference to the provision in this Agreement upon which such claim
is based; PROVIDED, that the rights of indemnification and reimbursement
provided for under this ARTICLE XI

                                       69


shall survive the applicable Expiration Date in the event that the
Indemnified Party's failure or delay to give the Claim Notice is the result of
common law fraud or intentional misrepresentation with the intent to deceive on
the part of the Indemnifying Party, in which case, the Indemnified Party may
continue to pursue its right of indemnification or reimbursement hereunder
beyond the applicable Expiration Date.

     Section 11.2 INDEMNIFICATION BY SELLER AND SELLER SUB. Seller and Seller
Sub jointly and severally shall indemnify and hold harmless Purchaser, its
Affiliates, and their respective officers, directors and employees
(collectively, the "PURCHASER INDEMNIFIED PARTIES"), from and against any and
all Losses incurred or suffered, directly or indirectly, by any such Person
arising from, by reason of or in connection with:

              (a) any breach or inaccuracy of any representation or warranty of
Seller or Seller Sub contained in this Agreement or any Other Agreement or in
connection with the consummation of the Transactions (without giving effect to
any supplement to the Seller Disclosure Schedule pursuant to SECTION 6.9);

              (b) the non-fulfillment or breach by Seller or Seller Sub of any
of its covenants, agreements or obligations under this Agreement or any Other
Agreement;

              (c) any Excluded Liability or Excluded Asset;

              (d) the failure of Seller or Seller Sub to comply with any Law
(other than to the extent the Law relates to Taxes) relating to bulk sales Law,
fraudulent transfer Law, or similar Law applicable to the transaction;

              (e) the failure of Seller, Seller Sub or any of their respective
Affiliates to transfer an Omitted Asset to Purchaser at Closing;

              (f) any Transfer Taxes or Apportioned Obligations allocated to
Seller pursuant to SECTION 8.9;

              (g) any Plan established or maintained by Seller or Seller Sub;

              (h) any Order by a court of competent jurisdiction that finds that
the approval of Seller's stockholders was required in order for Seller to
consummate the Transactions, following a failure by Seller to seek such
stockholder approval;

              (i) any failure by Seller to maintain a group health plan within
the meaning of Section 4980B of the Code or Part 6 of Title 1 of ERISA in
accordance with SECTION 9.2(D), including (A) the obligation to provide
continuation coverage of health insurance under Section 4980B of the Code or
Part 6 of Title 1 of ERISA or other similar state of local Law for current and
former employees of Seller, Seller Sub and their respective Affiliates and their
eligible dependents who experienced a "qualifying event" prior to the Effective
Time (or prior to the date of hire by Purchaser in the case of a Product
Employee not actively employed at the Effective Time), and (B) the obligation to
provide health insurance coverage prior to their date of hire (if any) by
Purchaser to Product Employees who are not actively employed at the Effective
Time; and

                                       70


              (j) any failure of Seller, Seller Sub or any of their respective
Affiliates to terminate prior to the Effective Time the employment of any
Product Employees who will not receive an offer of employment from Purchaser
pursuant to SECTION 9.1(A) or from Seller's, Seller Sub's or any of their
respective Affiliates' failure to provide any notice required by the WARN Act,
or any state plant closing or notification law, or similar Law in other
jurisdictions with regard to Product Employees who are terminated by Seller,
Seller Sub or any of their respective Affiliates prior to, at, or within thirty
(30) days following the Effective Time.

     Section 11.3 INDEMNIFICATION BY PURCHASER. Eisai Inc. and Eisai, Ltd.
jointly and severally shall indemnify and hold harmless Seller, Seller Sub,
their respective Affiliates and their respective officers, directors and
employees (collectively, the "SELLER INDEMNIFIED PARTIES"), from and against any
and all Losses incurred or suffered, directly or indirectly, by any such Person
arising from, by reason of or in connection with:

              (a) any breach or inaccuracy of any representation or warranty of
Purchaser contained in this Agreement or any Other Agreement or in connection
with the consummation of the Transactions;

              (b) the non-fulfillment or breach by Purchaser of any of its
covenants, agreements or obligations under this Agreement or any Other
Agreement;

              (c) any Transfer Tax or Apportioned Obligations allocated to
Purchaser pursuant to SECTION 8.9;

              (d) any Assumed Liability; and

              (e) except with respect to matters for which Seller and Seller Sub
are required to indemnify Purchaser hereunder, Purchaser's ownership of the
Purchased Assets
and Inventory and operation of the Product Line Business following the Closing
Date.

      Section 11.4 CERTAIN PROCEDURES FOR INDEMNIFICATION.

              (a) If any Person entitled to indemnification under this Agreement
(an "INDEMNIFIED PARTY") asserts a claim for indemnification, or receives notice
of the assertion of any claim or of the commencement of any Action by any Person
not a Party to this Agreement against such Indemnified Party, for which a Party
to this Agreement is required to provide indemnification under this ARTICLE XI
(an "INDEMNIFYING PARTY"), the Indemnified Party promptly deliver to the
Indemnifying Party a Claim Notice; PROVIDED, HOWEVER, that the failure to so
notify the Indemnifying Party shall not relieve the Indemnifying Party from any
liability which it may have to the Indemnified Party, except to the extent that
such failure materially prejudices the Indemnifying Party's ability to defend
such action.

              (b) The Indemnifying Party shall have thirty (30) days after
receipt of any such Claim Notice to (i) agree to the basis of the claim and the
amount and method of computation of Losses set forth in the Claim Notice, if
any, or (ii) provide such Indemnified Party with notice that the Indemnifying
Party disagrees with the basis of the claim or the amount or method of
computation set forth in the Claim Notice, if any (the "INDEMNITY DISPUTE
NOTICE"). To the extent the Indemnifying Party has not delivered an Indemnity
Dispute Notice within the

                                       71


thirty-day period, the Indemnifying Party shall be deemed to have accepted
the basis of the claim, and the amount and method of computation of Losses, if
any, set forth in the Claim Notice. Within fifteen (15) days after the giving of
the Indemnity Dispute Notice, the Indemnifying Party and the Indemnified Party
shall negotiate in a BONA FIDE attempt to resolve the matter. If the Indemnified
Party and the Indemnifying Party have not resolved such dispute within thirty
(30) days through good faith negotiations, such dispute shall be resolved by
litigation in an appropriate court of competent jurisdiction or other mutually
agreeable non-judicial dispute resolution mechanism.

              (c) With respect to third party Actions for which indemnification
is claimed hereunder, the Indemnifying Party shall be entitled to appoint
counsel of the Indemnifying Party's choice at the expense of the Indemnifying
Party to represent the Indemnified Party and direct the defense of any Action at
its sole cost and expense, PROVIDED that (i) the Indemnifying Party provides the
Indemnified Party notice of its election to assume the defense of such Action
within fifteen (15) days of receipt of the applicable Claim Notice, (ii) the
Indemnifying Party has the financial resources to pay such damages and (iii)
such counsel is reasonably satisfactory to the Indemnified Party. If the
Indemnifying Party fails to provide notice of its election to assume the defense
of such Action as provided in the preceding sentence, the Indemnifying Party
shall not be bound by any determination made in such Action or settlement or
compromise of such Action effected by the Indemnified Party without Seller's
prior written consent (which consent shall not be unreasonably withheld or
delayed). After notice from the Indemnifying Party to the Indemnified Party of
its election to assume the defense of such Action, the Indemnifying Party shall
not be liable to the Indemnified Party under this SECTION 11.4 for any legal or
other expenses subsequently incurred by the Indemnified Party in connection with
the defense thereof other than reasonable costs of investigation or of
assistance as contemplated by this SECTION 11.4; PROVIDED, HOWEVER, that if, in
the opinion of counsel (which may be in-house counsel) to the Indemnified Party,
it is advisable for the Indemnified Party to be represented by separate counsel
due to actual or potential conflicts of interest, the Indemnified Party shall
have the right to employ counsel to represent it and in that event the fees and
expenses of such separate counsel shall be paid by the Indemnifying Party. If
the Indemnifying Party assumes the defense of the third party Action: it will be
conclusively established for purposes of this Agreement that the claims made in
that third party Action are within the scope and subject to indemnification
pursuant to this ARTICLE XI, and so long as the Indemnifying Party shall
diligently and vigorously conduct such defense, (i) the Indemnified Party shall
not admit any liability with respect to, or settle, compromise or discharge,
such third party Action without the Indemnifying Party's prior written consent
(which consent shall not be unreasonably withheld or delayed); and (ii) the
Indemnified Party shall agree to any settlement, compromise or discharge of the
third party Action that the Indemnifying Party may recommend that (A) can be
resolved by money damages alone, (B) by its terms obligates the Indemnifying
Party to pay the full amount of the Losses in connection with such third party
Action, and (C) completely and unconditionally releases the Indemnified Party in
connection with such third party Action.

              (d) The Indemnified Party and the Indemnifying Party each shall
render to one another such assistance as may reasonably be requested in order to
ensure the proper and adequate defense of any such Action, including furnishing
records, information and testimony, providing witnesses, and attending
conferences, discovery proceedings, hearings, trials and appeals, in each case
as may be reasonably requested in connection therewith. Such cooperation

                                       72


shall include affording to the Indemnifying Party or Indemnified Party, as
applicable, access during regular business hours to, and reasonable retention by
each such Person of, records and information that are reasonably relevant to
such Action and making each such Person and such Person's employees and agents
available on an agreed-upon, mutually convenient basis to provide additional
information and explanation of any material provided hereunder. The Indemnifying
Party shall reimburse each such Person for all reasonable out-of-pocket expenses
in connection therewith.

     Section 11.5 LIMITATIONS.

              (a) In no event shall the respective Indemnifying Parties be
liable for any Losses for claims made pursuant to SECTION 11.2 or 11.3 (each, an
"INDEMNITY CLAIM"), as applicable, unless the aggregate amount of all
indemnified Losses for which Indemnity Claims have been made against the
Indemnifying Party exceeds One Million Five Hundred Thousand Dollars
($1,500,000) (the "DEDUCTIBLE"), in which case the Indemnifying Party shall,
subject to the other limitations contained herein, be liable for such
indemnified Losses in excess of the Deductible. Notwithstanding the foregoing,
indemnification claims made other than pursuant to SECTION 11.2(A) or 11.3(A)
shall not be subject to the Deductible unless an Indemnity Claim for the Loss in
question could have been asserted pursuant to SECTION 11.2(A) or 11.3(A), as the
case may be. For the avoidance of doubt, it is the intention of the Parties that
Losses that arise out of or are the result of breaches of representations and
warranties be subject to the Deductible, even if they are also breaches of other
covenants or agreements that are not subject to the Deductible. Notwithstanding
the foregoing, the limitations set forth in this SECTION 11.5 (A) shall not be
applicable to Losses for which an Indemnity Claim is asserted under SECTION
11.2(D), SECTION 11.2(e), SECTION 11.2(F), SECTION 11.2(G), SECTION 11.2(H),
SECTION 11.2(I), SECTION 11.2(J) or SECTION 11.3(C), for claims for breach under
SECTION 2.1(C), SECTION 2.8, SECTION 8.5, or for claims for breach of any
representation or warranty set forth in SECTION 4.1, SECTION 4.2, SECTION
4.4(A), SECTION 4.11, SECTION 4.12, SECTION 4.15(I), SECTION 4.20, SECTION 5.1,
SECTION 5.2, or SECTION 5.7.

              (b) Except as provided under this SECTION 11.5(B), no event shall
Seller and Seller Sub, on the one hand, or Purchaser, on the other hand, be
liable for Losses for claims made pursuant to this ARTICLE XI in an amount in
excess of Twenty Million Dollars ($20,000,000) in the aggregate for any and all
indemnified Losses hereunder (the "CAP"). Notwithstanding the foregoing, (i)
with respect to breaches of the representation and warranty set forth in SECTION
4.15(I), the "Cap" shall be Thirty Million Dollars ($30,000,000); and (ii) the
limitations set forth in this SECTION 11.5(B) shall not be applicable to Losses
for Indemnity Claims (A) pursuant to SECTION 11.2(D), SECTION 11.2(E), SECTION
11.2(F), SECTION 11.2(G), SECTION 11.2(H), SECTION 11.2(I), SECTION 11.2(J) or
SECTION 11.3(C); (B) for breach of SECTION 2.1(C), SECTION 2.8, SECTION 8.5; or
(C) for breach of any representation or warranty set forth in SECTION 4.1,
SECTION 4.2, SECTION 4.4(A), SECTION 4.11, SECTION 4.12, SECTION 4.20, SECTION
5.1, SECTION 5.2, or SECTION 5.7.

              (c) The amount of any Losses recoverable by a Party under SECTION
11.2 or SECTION 11.3, as applicable, shall be reduced by the amount of any
insurance proceeds paid to the Indemnified Party relating to such claim.

              (d) EXCEPT WITH RESPECT TO LOSSES INCURRED AS THE RESULT OF COMMON
LAW FRAUD, THE INDEMNIFICATION OBLIGATIONS OF THE PARTIES

                                       73


HERETO SHALL NOT EXTEND TO SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES,
INCLUDING BUSINESS INTERRUPTION, LOST PROFITS, PUNITIVE DAMAGES, DIMINUTION OF
VALUE, OR LOSS OF BUSINESS REPUTATION OR OPPORTUNITY.

              (e) Each Party shall have a right to indemnification pursuant to
this ARTICLE XI for any Losses incurred as the result of any common law fraud or
intentional misrepresentation with the intent to deceive by any other Party or
any officer or director (or similarly situated person) of such other Party
without regard to the limitations set forth in SECTIONS 11.5(A) and 11.5(B).

              (f) Any indemnity or reimbursement payment made pursuant to this
Agreement shall be treated as an adjustment to the Purchase Price for all Tax
purposes, except as otherwise required by applicable Law.

              (g) Each Party shall be entitled to set off, offset and deduct
against amounts due from such Party to the other Party for Losses suffered by
such first Party under this Agreement; PROVIDED, HOWEVER, no Party shall offset
any indemnified Losses unless and until the Indemnity Claims giving rise to such
indemnified Losses exceeds One Million Five Hundred Thousand Dollars
($1,500,000), in which case, such offsetting Party may offset any additional
indemnified Losses arising from Indemnity Claims up to and until such
indemnified Losses from Indemnity Claims exceed Twenty Million Dollars
($20,000,000), in which case, such offsetting Party may not offset any
additional indemnified Losses arising from Indemnity Claims.

     Section 11.6 ESCROW. On the Closing Date, Purchaser shall deposit the
Escrow Amount with the Escrow Agent at Closing, by direct wire transfer of
immediately available funds into the Escrow Account, in accordance with the
terms of this Agreement and the Escrow Agreement. On the sixth (6) month
anniversary of the Closing Date, the Escrow Agent shall release fifty percent
(50%) of the then existing amount of the Escrow Amount to Seller, LESS the
amount of Indemnity Claims asserted by Purchaser in good faith, which have not
been paid, PLUS any amounts offset by Purchaser pursuant to and in accordance
with SECTION 11.5(G), in respect of Indemnity Claims asserted by Purchaser in
good faith, which have not been paid, and any unreleased amount shall be
retained by the Escrow Agent. On the one year anniversary of the Closing Date,
the Escrow Agent shall release the then existing Escrow Amount to Seller, LESS
the amount of Indemnity Claims asserted by Purchaser in good faith, which have
not been paid, PLUS any amounts offset by Purchaser pursuant to and in
accordance with SECTION 11.5(G), and any unreleased amount shall be retained by
the Escrow Agent. The amount of the Escrow Amount so retained shall be released
by the Escrow Agent (to the extent not utilized to pay Purchaser for any such
claims resolved in favor of Purchaser) in accordance with the resolution of such
claims.

     Section 11.7 SATISFACTION OF CLAIMS.

              (a) Except as provided in SECTION 2.8(C), claims made by a
Purchaser Indemnified Party for indemnification under SECTION 11.2 shall be
satisfied from (i) first, funds set off, offset or deducted against amounts then
due and payable pursuant to and in accordance with SECTION 11.5(G), (ii) second,
funds held in the Escrow Account; and (iii) third, by payment of cash or other
immediately available funds from Seller.


                                       74


              (b) Claims made by a Seller Indemnified Party for indemnification
under SECTION 11.3 shall be satisfied by payment of cash or other immediately
available funds from Purchaser.

     Section 11.8 EXCLUSIVE REMEDY. Following the Closing, absent claims for
common law fraud, intentional misrepresentation with the intent to deceive, (a)
claims for indemnification pursuant to this ARTICLE XI, and (b) claims for
specific performance or any other equitable remedies of the covenants and
obligations of the other Party under this Agreement and the Other Agreements,
shall, collectively, be the sole and exclusive remedies for claims and damages
available to the Parties and their respective Affiliates for breach of this
Agreement.

                                  ARTICLE XII.
                                 MISCELLANEOUS

     Section 12.1 ASSIGNMENT; BINDING EFFECT. This Agreement shall be binding
upon and inure to the benefit of the Parties and their respective successors and
assigns; PROVIDED, HOWEVER, that no Party may sell, transfer, assign, license,
sublicense, delegate, pledge or otherwise dispose of, whether voluntarily,
involuntarily, by operation of Law or otherwise, this Agreement or any of its
rights or obligations under this Agreement, in whole or in part, without the
prior written consent of the other Parties, which consent shall not be
unreasonably delayed, withheld or conditioned; PROVIDED FURTHER, any Party shall
have the right, without the consent of the other Parties, to perform any or all
of its obligations and exercise any or all of its rights under this Agreement
through any of its Affiliates; PROVIDED FURTHER, that any permitted assignment
shall protect the non-assigning Parties' rights under this Agreement; and
PROVIDED FURTHER, that a change of control of Seller, Seller Sub or Purchaser
following the Execution Date shall not require the consent of any other Party.
Any attempted assignment, delegation or other disposition in violation of this
SECTION 12.1 shall be void.

     Section 12.2 CUMULATIVE RIGHTS. Except as expressly provided herein, the
various rights under this Agreement shall be construed as cumulative, and no one
of them is exclusive of any other or exclusive of any rights allowed by Law.

     Section 12.3 EXPENSES. Except as otherwise specified herein, each Party
shall bear any costs and expenses with respect to the Transactions incurred by
it.

     Section 12.4 NOTICES. All notices, requests, claims, demands and other
communications hereunder shall be in writing and shall be deemed to have been
duly given (a) when received if delivered personally or by reputable courier
maintaining records of receipt, (b) when transmitted if sent by facsimile or
other electronic transmission during normal business hours with confirmation of
transmission by the transmitting equipment, (c) upon receipt, if sent by
registered or certified mail (postage prepaid, return receipt requested) and (d)
the day after it is sent, if sent for next-day delivery to a domestic address by
overnight mail or courier by reputable courier maintaining records of receipt,
to the Parties at the following addresses:

                                       75


         If to Seller or Seller Sub, to:

                  Ligand Pharmaceuticals Incorporated
                  10275 Science Center Drive
                  San Diego, California 92121
                  Attention: General Counsel

         with a copy sent concurrently to:

                  Latham & Watkins LLP
                  12636 High Bluff Drive, Suite 400
                  San Diego, California 92130
                  Attn: Scott Wolfe
                  Attn: Faye Russell

         If to Purchaser, to:

                  Eisai Inc.
                  Glenpointe Centre West
                  500 Frank W. Burr Boulevard
                  Teaneck, NJ  07666
                  Facsimile:  (201) 692-9120
                  Attention:  General Counsel

                  and to:

                  Eisai Co., Ltd.
                  Koishikawa 4-6-10
                  Bunkyo-Ku, Tokyo 11208088
                  Japan
                  Fax:  +81-3-3811-5535
                  Attention:  Director, Legal Department

         with copies sent concurrently to:

                  Covington & Burling LLP
                  1201 Pennsylvania Avenue, NW
                  Washington, D.C. 20004
                  Facsimile:  (202) 778-5567
                  Attention:  Catherine J. Dargan, Esq.

PROVIDED, HOWEVER, that if any Party shall have designated a different address
by ten (10) days' prior written notice to the other Parties, then to the last
address so designated.

     Section 12.5 ENFORCEABILITY; SEVERABILITY. If any term, provision, covenant
or restriction of this Agreement is held by a court of competent jurisdiction or
other authority to be invalid, void, unenforceable or against its regulatory
policy, in whole or in part, such

                                       76


determination shall not affect or impair the validity or enforceability of
any other provision, covenant, or restriction, each of which is hereby declared
to be separate and distinct, or of the remainder of this Agreement. If any
provision of this Agreement is so broad as to be unenforceable, such provision
shall be interpreted to be only as broad as is enforceable. If any provision of
this Agreement shall be declared invalid or unenforceable for any reason other
than overbreadth, the offending provision shall be modified so as to maintain
the essential benefits of the bargain between the Parties to the maximum extent
possible, consistent with Law and public policy. Each of the Parties
acknowledges, however, that the provisions of this Agreement, including SECTION
10.2(B) regarding the Termination Fee, have been negotiated by the Parties and
that such provisions are reasonable in light of the circumstances pertaining to
the Parties.

     Section 12.6 AMENDMENT; ENTIRE AGREEMENT. This Agreement may not be
amended, supplemented or otherwise modified except by an instrument in writing
signed by all of the Parties hereto. This Agreement, the Other Agreements and
the Confidentiality Agreement, together with the Schedules and Exhibits attached
hereto and thereto, contain the entire agreement of the Parties hereto with
respect to the Transactions, superseding all negotiations, prior discussions and
preliminary agreements made prior to the date hereof.

     Section 12.7 NO THIRD PARTY BENEFICIARIES. Except as otherwise set forth
under SECTION 8.14, this Agreement is solely for the benefit of the Parties
hereto and their respective Affiliates and no provision of this Agreement shall
be deemed to confer upon any third parties any remedy, claim, liability,
reimbursement, claim of action or other right under this Agreement.

     Section 12.8 WAIVER. No waiver of any provision of this Agreement shall be
effective unless it is in writing and signed by the Party against whom
enforcement of any such waiver is sought. Such waiver shall be effective only in
the specific instance and for the purpose for which given. The failure or delay
of any Party to enforce any condition or part of this Agreement at any time
shall not be construed as a waiver of that condition or part, nor shall it
forfeit any rights to future enforcement thereof.

     Section 12.9 GOVERNING LAW; JURISDICTION. This Agreement (including any
claim or controversy arising out of or relating to this Agreement) shall be
governed by the Law of the State of New York without regard to conflict of law
principles that would result in the application of any Law other than the Law of
the State of New York. All Actions arising out of or relating to this Agreement,
the Other Agreements and the Transactions or for recognition or enforcement of
any judgment relating thereto, shall be heard and determined exclusively in (a)
the Supreme Court of the State of New York, and the appellate courts thereof or
(b) the United States District Court for the Southern District of New York and
the appellate courts thereof, and each of the Parties hereby irrevocably and
unconditionally (i) agrees not to commence any such Action except in such
courts, (ii) agrees that any claim in respect of any such Action may be heard
and determined in such courts, (iii) waives, to the fullest extent it may
legally and effectively do so, any objection which it may now or hereafter have
to the laying of venue of any Action in such courts, and (iv) waives, to the
fullest extent permitted by Law, the defense of an inconvenient forum to the
maintenance of such Action in such courts. Each of the Parties hereto agrees
that a final judgment in any such Action shall be conclusive and may be enforced
in other jurisdictions by suit on the judgment or in any other manner provided
by Law. Each Party to this Agreement irrevocably consents to service of process
in the manner provided for notices in

                                       77


SECTION 12.4. Nothing in this Agreement will affect the right of any Party
to this Agreement to serve process in any other manner permitted by Law.

     Section 12.10 INJUNCTIVE RELIEF. Notwithstanding anything to the contrary
in this Agreement, any Party will have the right to seek temporary injunctive
relief in any court of competent jurisdiction as may be available to such Party
under the Law applicable in such jurisdiction with respect to any matters
arising out of any other Party's performance of its obligations under this
Agreement, the Other Agreements or with respect to the Transactions. Each Party
agrees that in the event another Party institutes an appropriate Action seeking
injunctive/equitable relief for specific performance under this Agreement, the
Party seeking such relief shall not be required to provide the other Party with
service of process of a complaint and summons under the procedures set forth in
any Canadian or other non-United States judicial process or system. Under such
circumstances, the Party seeking such relief need only provide the other Party
with two copies of a true, correct and lawfully issued summons and complaint,
via Federal Express (priority delivery).

     Section 12.11 WAIVER OF JURY TRIAL. EACH PARTY IRREVOCABLY AND
UNCONDITIONALLY WAIVES ANY RIGHT TO TRIAL BY JURY WITH RESPECT TO ANY ACTION
RELATING TO OR ARISING OUT OF THIS AGREEMENT, THE OTHER AGREEMENTS, OR THE
TRANSACTIONS.

     Section 12.12 HEADINGS. The headings of the sections and subsections of
this Agreement are inserted for convenience only and shall not be deemed to
constitute a part hereof.

     Section 12.13 COUNTERPARTS. This Agreement may be executed manually or by
facsimile by the Parties, in any number of counterparts, each of which shall be
considered one and the same agreement and shall become effective when a
counterpart hereof shall have been signed by each of the Parties and delivered
to the other Parties. Delivery of an executed counterpart of a signature page of
this Agreement or any amendment hereto by facsimile or other electronic
transmission shall be effective as delivery of a manually executed original
counterpart hereof.

     Section 12.14 SCHEDULES. Purchaser agrees that any disclosure by Seller or
Seller Sub in any Schedule attached hereto shall not establish any threshold of
materiality or concede the materiality of any matter or item disclosed.

     Section 12.15 CONSTRUCTION. The language in all parts of this Agreement
shall be construed, in all cases, according to its fair meaning. The Parties
acknowledge that each Party and its counsel have reviewed and revised this
Agreement and that any rule of construction to the effect that any ambiguities
are to be resolved against the drafting Party shall not be employed in the
interpretation of this Agreement.

                              * * * * * * * * * * *

                                       78


         IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be
executed by their respective duly authorized officers as of the date first above
written.


                     LIGAND PHARMACEUTICALS INCORPORATED


                     By:  /s/ Henry F. Blissenbach
                         __________________________________
                         Name:   Henry F. Blissenbach
                         Title:  Chairman & CEO


                     SERAGEN, INC.


                     By:  /s/ Warner R. Broaddus
                         __________________________________
                         Name:   Warner R. Broaddus
                         Title:  Secretary


                     EISAI INC.


                     By:  /s/ Lonnel Coats
                         __________________________________
                         Name:
                         Title:


                     EISAI CO., LTD.


                     By:  /s/ Hideki Hayashi
                         __________________________________
                         Name:   Hideki Hayashi
                         Title:  Vice President
                                 Corporate Business Development