TRIANGLE PHARMACEUTICALS INC
8-K, 1999-06-18
PHARMACEUTICAL PREPARATIONS
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<PAGE>

                       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



                                  JUNE 2, 1999
                   (Date of Report - earliest event reported)



                         TRIANGLE PHARMACEUTICALS, INC.
               (Exact name of registrant as specified in charter)


                 DELAWARE                     000-21589         56-1930728
(State of incorporation or organization)     (Commission       (IRS Employer
                                             File Number)   Identification No.)

     4 University Place, 4611 University Drive, Durham, North Carolina 27707


        Registrant's telephone number, including area code: (919)493-5980

                                      NONE
     -----------------------------------------------------------------------
         (Former name or former address, if changed since last report.)

<PAGE>

Item 5.  OTHER EVENTS.

              ALLIANCE AGREEMENTS

              On June 2, 1999, Triangle Pharmaceuticals, Inc. ("Triangle") and
Abbott Laboratories ("Abbott") executed a Collaboration Agreement (the
"Collaboration Agreement"), a Co-Promotion Agreement (the "Co-Promotion
Agreement"), a Common Stock Purchase Agreement (the "Stock Purchase Agreement"),
and a Stockholder Rights Agreement (the "Stockholder Agreement") (collectively,
the "Alliance Agreements"). The closing of each of the Alliance Agreements is
subject to the satisfaction of several conditions, including the closing of each
of the other Alliance Agreements, Hart-Scott-Rodino antitrust clearance, the
negotiation of a manufacturing agreement between the parties, as well as the
satisfaction or waiver of various other closing conditions under the various
Alliance Agreements.

              The purpose of the Alliance Agreements is to establish a
world-wide strategic alliance between Triangle and Abbott for six antiviral
compounds. Pursuant to the terms of the Alliance Agreements, Triangle and Abbott
will collaborate with respect to the clinical development, registration,
distribution and marketing of various proprietary pharmaceutical products for
the prevention and treatment of human immunodeficiency virus ("HIV") and
hepatitis B virus. In the United States, Triangle and Abbott will co-promote
four Triangle products currently in active development for HIV and/or hepatitis
B, Coactinon-TM-, Coviracil-TM-, DAPD and L-FMAU, and Abbott's two HIV protease
inhibitors, Norvir-Registered Trademark- (ritonavir), approved in 1996, and
ABT-378, currently in Phase III development. Outside the United States, Abbott
will have exclusive sales and marketing rights for the four Triangle antiviral
compounds. Triangle and Abbott will share profits and losses for all Triangle
drug candidates. Triangle will receive detailing fees and commissions on
incremental sales they generate for Abbott's protease inhibitors. In addition,
Abbott will have the right of first discussion to market future Triangle
compounds.

              The Collaboration Agreement provides for non-contingent research
funding of $31.7 million and up to $185 million of contingent development
milestone payments and the sharing of future commercialization costs. In
addition pursuant to the terms of the Stock Purchase Agreement, Abbott will
purchase approximately 6.57 million shares of Triangle common stock (the
"Shares") at $18 per share.

              Subject to various conditions and restrictions, the Stockholder
Agreement provides for registration and board representation rights in
connection with the Shares, as well as additional rights under Triangle's
current Rights Agreement (defined below), as amended and further discussed
below. The Stockholder Agreement also restricts the transfer of the Shares and
subjects Abbott to certain standstill requirements, subject to various terms and
conditions.

              The foregoing description of the Alliance Agreements does not
purport to be complete and is qualified in its entirety by reference to the full
text of the Alliance Agreements and of the press release filed herewith or
referenced as Exhibits 2.1 through 2.4, 4.1 and 99.1 and incorporated herein by
this reference.


                                       2
<PAGE>

              RIGHTS AGREEMENT

              In connection with the Alliance Agreements, the Board of Directors
of Triangle approved an amendment (the "Amendment"), dated as of June 2, 1999 to
the Rights Agreement, dated February 1, 1999, by and between Triangle and
American Stock Transfer & Trust Company, as Rights Agent (the "Rights
Agreement"). All capitalized terms below and not defined herein have the
meanings given them in the Rights Agreement, as amended.

              The Amendment provides that (i) from the Effective Date (as such
term is defined in the Collaboration Agreement) up until such time as Abbott
holds less than the Minimum Purchaser Interest (as such term is defined in the
Stockholder Agreement), neither Abbott nor its U.S. wholly-owned subsidiaries
shall be deemed to be an Acquiring Person, that the Distribution Date will not
be deemed to occur and that the Rights will not separate from the Common Stock
as a result of entering into the Alliance Agreements or the consummation of the
transactions contemplated thereby (other than any purchases permitted under
Section 5.3 of the Stockholder Agreement or otherwise which cause Abbott's
Beneficial Ownership (as the term "Beneficial Ownership" is defined in the
Stockholder Agreement) of shares of Triangle's Common Stock to exceed 21% of the
total shares of Common Stock of Triangle outstanding from time to time
hereafter) or as a result of the acquisition by Abbott of Beneficial Ownership
(as defined in the Stockholder Agreement) of shares of Common Stock of Triangle
not exceeding twenty-one percent (21%) of the total shares of Common Stock of
Triangle outstanding from time to time hereafter, and (ii) for the period
commencing as of the date of the Stockholder Agreement and ending on the earlier
of (x) the Effective Date and (y) termination of the Stockholder Agreement (the
"Interim Period"), neither Abbott nor its U.S. wholly-owned subsidiaries shall
be deemed to be an Acquiring Person, that the Distribution Date will not be
deemed to occur and that the Rights will not separate from the Common Stock as a
result solely of Abbott entering into the Stockholder Agreement and being deemed
the Beneficial Owner of the Shares (as defined in the Stock Purchase Agreement);
provided that Abbott does not become the Beneficial Owner (as defined in the
Stockholder Agreement) of any securities of Triangle in addition to the Shares
during the Interim Period.

              The foregoing description of the Amendment does not purport to be
complete and is qualified in its entirety by reference to the full text of the
Amendment filed herewith as Exhibit 4.1 and incorporated herein by this
reference.

Item 7.  EXHIBITS.

       * 2.1     Collaboration Agreement, dated as of June 2, 1999 by and
                 between Triangle Pharmaceuticals, Inc. and Abbott Laboratories.

       * 2.2     Co-Promotion Agreement, dated as of June 2, 1999 by and between
                 Triangle Pharmaceuticals, Inc. and Abbott Laboratories.

       + 2.3     Triangle Pharmaceuticals, Inc. Common Stock Purchase Agreement,
                 dated as of June 2, 1999 by and between Triangle
                 Pharmaceuticals, Inc. and Abbott Laboratories.

<PAGE>

       + 2.4     Triangle Pharmaceuticals, Inc. Stockholder Rights Agreement,
                 dated as of June 2, 1999 by and between Triangle
                 Pharmaceuticals, Inc. and Abbott Laboratories.

         4.1     Amendment to Rights Agreement, dated as of June 2, 1999 by and
                 between Triangle Pharmaceuticals, Inc. and Abbott Laboratories.

       + 99.1    Press Release dated June 3, 1999.

       *         Certain confidential portions of this Exhibit were omitted by
                 means of marking such portions with an asterisk (the "Mark").
                 This Exhibit has been filed with the Secretary of the
                 Commission without the Mark pursuant to the Company's
                 application requesting confidential treatment under Rule 24b-2
                 under the Securities Exchange Act of 1934, as amended.

       +         Filed as an exhibit to Abbott Laboratories' Schedule 13D filed
                 with the Securities and Exchange Commission on June 11, 1999
                 and incorporated herein by reference.




                                    SIGNATURE

         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 thereunto duly authorized.








                                   TRIANGLE PHARMACEUTICALS, INC.




DATE:  June 18, 1999               By:      /s/ James A. Klein, Jr.
                                   -----------------------------------
                                   Name:  James A. Klein, Jr.
                                   Title:  Chief Financial Officer and Treasurer

<PAGE>

                         TRIANGLE PHARMACEUTICALS, INC.

                                    FORM 8-K

                                  EXHIBIT INDEX

<TABLE>
<CAPTION>
     EXHIBIT      DOCUMENT DESCRIPTION
      NUMBER      --------------------
     -------
     <S>          <C>
      * 2.1       Collaboration Agreement, dated as of June 2, 1999 by and
                  between Triangle Pharmaceuticals, Inc. and Abbott
                  Laboratories.
      * 2.2       Co-Promotion Agreement, dated as of June 2, 1999 by and
                  between Triangle Pharmaceuticals, Inc. and Abbott
                  Laboratories.
      + 2.3       Triangle Pharmaceuticals, Inc. Common Stock Purchase
                  Agreement, dated as of June 2, 1999 by and between Triangle
                  Pharmaceuticals, Inc. and Abbott Laboratories.
      + 2.4       Triangle Pharmaceuticals, Inc. Stockholder Rights Agreement,
                  dated as of June 2, 1999 by and between Triangle
                  Pharmaceuticals, Inc. and Abbott Laboratories.
        4.1       Amendment to Rights Agreement, dated as of June 2, 1999 by
                  and between Triangle Pharmaceuticals, Inc. and Abbott
                  Laboratories.
     + 99.1       Press Release dated June 3, 1999.
          *       Certain confidential portions of this Exhibit were omitted by
                  means of marking such portions with an asterisk (the "Mark").
                  This Exhibit has been filed with the Secretary of the
                  Commission without the Mark pursuant to the Company's
                  application requesting confidential treatment under Rule 24b-2
                  under the Securities Exchange Act of 1934, as amended.
          +       Filed as an exhibit to Abbott Laboratories' Schedule 13D
                  filed with the Securities and Exchange Commission on June
                  11, 1999 and incorporated herein by reference.
</TABLE>

<PAGE>


                                                                     EXHIBIT 2.1




                             COLLABORATION AGREEMENT

                  This Collaboration Agreement (the "Agreement") is made as of
June 2, 1999 by and between Triangle Pharmaceuticals, Inc., a Delaware
corporation ("Triangle"), with its principal offices at 4 University Place, 4611
University Drive, Durham, North Carolina 27707, and Abbott Laboratories, an
Illinois corporation ("Abbott"), with its principal offices at 100 Abbott Park
Road, Abbott Park, Illinois 60064.

                                   WITNESSETH

                  WHEREAS, Triangle is developing and seeking regulatory
approval for various proprietary drugs for the prevention and treatment of HIV,
HBV and any other indications;

                  WHEREAS, Triangle desires to collaborate with another
pharmaceutical company with respect to the clinical development, registration,
distribution and marketing of such products throughout the world;

                  WHEREAS, Abbott desires to collaborate with Triangle with
respect to such products;

                  WHEREAS, of even date herewith, Abbott and Triangle shall
enter into three other agreements in support of their collaboration: (i) a
Co-Promotion Agreement pursuant to which Abbott will grant Triangle the right to
co-promote certain Abbott HIV drugs in the United States (the "Co-Promotion
Agreement"); (ii) a Stock Purchase Agreement pursuant to which Abbott shall
purchase an equity interest in Triangle's common stock (the "Stock Purchase
Agreement"); and (iii) a Stockholder Rights Agreement setting forth Abbott's
rights as a Triangle shareholder (the "Stockholder Rights Agreement"); and

                  WHEREAS, Abbott and Triangle shall in good faith negotiate a
Manufacturing and Supply Agreement (the "Supply Agreement") regarding the supply
of a portion of the bulk drug and/or finished products for the Products.

                  NOW, THEREFORE, in consideration of the foregoing and the
mutual covenants and undertakings contained herein, the parties hereto hereby
agree as follows:


*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

<PAGE>

                                   ARTICLE 1
                                   DEFINITIONS

                  In addition to the other terms defined elsewhere herein, the
following terms shall have the following meanings when used in this Agreement
(and any term defined in the singular shall have the same meaning when used in
the plural, and vice versa, unless stated otherwise):

                  1.1 "Abbott Cost of Goods" shall mean (i) with respect to
the Net Units of Product Sold in the U.S. Territory, the *** paid by Abbott
to Triangle for the Net Units of Product Sold in the U.S. Territory during
the given calendar quarter or year; (ii) with respect to the Net Units of
Product Sold in the International Territory, (A) to the extent that the
Compound or Product is sourced from the same Abbott manufacturing facilities
used under the Supply Agreement, the *** for the sale of such goods to
Triangle in the U.S. Territory during the given calendar quarter or year, (B)
to the extent that the Compound or Product is sourced from a different Abbott
manufacturing facility than those used under the Supply Agreement, the ***
and *** of *** and *** such goods during the given calendar quarter or year
and (C) to the extent that the Compound or Product is sourced from a Third
Party manufacturer, the *** for the *** of such goods during the given
calendar quarter or year; and (iii) with respect to the Territories, *** of
(A) *** during the given calendar quarter or year, (B) *** on the Compounds
and Products during the given calendar quarter or year, and (C) *** and ***
in the finished cost of the Products during the given calendar quarter or
year. Abbott's Cost of Goods shall be calculated separately for the U.S.
Territory and the International Territory.

                  1.2 "Abbott Distribution Expenses" shall mean (i) for the
U.S. Territory, *** of Abbott Net Sales in the U.S. Territory during the
given calendar quarter or year and (ii) for the International Territory, the
lesser of (A) *** of ***  in the International Territory during the given
calendar quarter or year and (B) a percentage calculated by dividing the ***
for all *** products during the given calendar quarter or year by the *** of
such products by the ***  during the given calendar quarter or year. The
Abbott Distribution Expenses shall be calculated separately for the U.S.
Territory and the International Territory.

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

                                      -2-
<PAGE>

                  1.3 "Abbott Distribution Margin" shall mean the ***  (i)
*** and (ii) *** for the given calendar quarter or year. The Abbott
Distribution Margin shall be calculated separately for the U.S. Territory and
the International Territory.

                  1.4 "Abbott International Profit Amount" shall have the
meaning set forth in Section 6.5(c).

                  1.5 "Abbott Net Sales" shall mean the total gross sales of the
Products (as set forth on the invoice for such Products) by Abbott and permitted
sublicensees to Third Parties in the given calendar quarter or year, plus, if
applicable, the value of all properties and services received in consideration
of a Sale of Products by Abbott and permitted sublicensees to Third Parties
during such calendar quarter or year, less the following deductions directly
paid or incurred by Abbott or its permitted sublicensees with respect to the
Sale of the Products in such calendar quarter or year:

                    (i)  with respect to the U.S. Territory, ***;

                    (ii) with respect to the International Territory,
                         ***; and

                    (iii) with respect to the Territories (A)***  and (B) ***.

Abbott's Net Sales shall be calculated separately for the U.S. Territory and the
International Territory.

                  1.6 "Abbott Operating Margin" shall mean the *** for the
given calendar quarter or year. The Abbott Operating Margin shall be
calculated separately for the U.S. Territory and the International Territory.

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

                                      -3-
<PAGE>

                  1.7 "Abbott Patents" shall mean (a) all of Abbott's rights
in any patents conceived, developed or owned by or otherwise licensed to or
controlled by Abbott ***, which include claims covering or potentially
covering the manufacture, use or sale of the Compounds or Products and (b)
all substitutions, extensions, divisionals, continuations,
continuations-in-part, reissues, reexaminations, renewals, supplementary
protection certificates or foreign counterparts of such patents and patent
applications identified in sub-part (a).

                  1.8 "Abbott SG&A" shall mean (i) the costs and expenses
permitted under Sections 4.2 and 4.3 which are incurred by Abbott and/or its
permitted sublicensees in the *** of the Products and, to the extent
permitted under Section 4.4, the Marketing Studies for the Products during
the given calendar quarter or year, in the categories set forth in Exhibit
1.8, (ii) *** costs and expenses incurred by Abbott in connection with claims
instituted by Abbott pursuant to Section 9.5 or 9.6 or, to the extent
reimbursed by Abbott pursuant to Section 9.8, by Triangle, (iii) the ***
costs and expenses of *** , (iv) the *** with respect to the *** for the
given calendar quarter or year and (v) such other costs and expenses
specifically included in Abbott SG&A pursuant to the terms of this Agreement.
The Abbott SG&A shall be calculated separately for the U.S. Territory and the
International Territory.

                  1.9 "Abbott Technology" shall mean all technical
information, inventions, discoveries, trade secrets, information, experience,
data, formulas, procedures, processes, know-how and results which are
necessary for the development, registration, manufacture, use or sale of the
Compounds or Products and which are owned by or otherwise licensed to or
controlled by Abbott *** during the Term.

                  1.10 "Abbott U.S. Profit Amount" shall have the meaning set
forth in Section 6.4(c).

                  1.11 "Affiliate" shall mean any corporation or
non-corporate business entity which controls, is controlled by, or is under
common control with a Party. A corporation or non-corporate business entity
shall be regarded as in control of another corporation or non-corporate
business entity if it owns, or directly or indirectly controls, at least ***
of the voting stock of the other corporation, or (a) in the absence of the
ownership of at least *** of the voting stock of a corporation or (b) in the
case of a non-corporate business entity, if it possesses, directly or
indirectly, the power to direct or cause the direction of the management and
policies of such corporation or non-corporate business entity, as applicable.
For purposes of this Agreement, *** and its subsidiaries, which

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

                                      -4-
<PAGE>

comprise Abbott's *** , are not Affiliates of Abbott; provided that neither
*** nor any of its subsidiaries may sell, Promote or Co-Promote the Compounds
or Products.

                  1.12 "Annual Reporting Period" shall mean a calendar year
with respect to the U.S. Territory and a fiscal year beginning December 1 and
ending November 30 for the International Territory.

                  1.13 "Co-Promote" or "Co-Promotion" shall mean the joint
activities of the Parties to Promote the Products under the Triangle
Trademarks in the U.S. Territory.

                  1.14 "Compounds" shall mean MKC-442, FTC, L-FMAU and DAPD.

                  1.15 "Confidential Information" shall have the meaning set
forth in Section 13.1.

                  1.16 "DAPD" shall mean *** of the formula set forth on
Exhibit 1.16 wherein *** , including all *** and *** thereof. DAPD is
exclusively licensed to Triangle by Emory University and the University of
Georgia Research Foundation, Inc., pursuant to a License Agreement dated
March 31, 1996 (the "DAPD License Agreement") for use as a pharmaceutical
product in the prevention and treatment of HIV and HBV throughout the entire
world.

                  1.17 "Detail" shall mean a face-to-face sales presentation
by a Sales Representative during which one or more of the Products is
marketed and promoted to a licensed medical physician, but not a resident or
intern or other health care professional, unless such individual has the
authority to write prescriptions for the Products pursuant to state statutes.
Attendance at meetings with managed care entities, conventions and
participation in continuing education programs shall not constitute a Detail.

                  1.18 "Detailing" shall mean the act of marketing and
promoting the Products through Details.

                  1.19 "Detailing Commitment" shall have the meaning set
forth in Section 4.2(c).

                  1.20 "Discretionary Funds" shall mean the miscellaneous
costs and expenses which represent that portion of the U.S. Co-Promotion
Budget that are used by the Sales Representatives in support of their
Detailing and marketing activity for the Products.

                  1.21 "Dollars" and "$" means United States dollars.

                  1.22 "Effective Date" shall mean the date upon which this
Agreement becomes effective upon the fulfillment of the conditions set forth
in Section 16.8.

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

                                      -5-
<PAGE>

                  1.23 "FDA" shall mean the U.S. Food and Drug Administration
or any successor entity thereto.

                  1.24 "FTC" shall mean: (i) the *** with the chemical name:
*** ; (ii) any mixture of the *** described in Subsection 1.24(i) and the ***
with the chemical name: *** , in which the ratio of such *** is equal to or
greater than ***; or (iii) any *** of any of the foregoing. FTC is
exclusively licensed to Triangle by Emory University pursuant to a License
Agreement dated April 17, 1996, as amended as of May 6, 1999 (the "FTC
License Agreement") for use as a pharmaceutical product in the prevention and
treatment of HIV and HBV throughout the entire world.

                  1.25 "Field of Use" shall mean the following: (i) for MKC-442,
all pharmaceutical uses; (ii) for FTC and DAPD, the prevention and treatment of
HIV and HBV; (iii) for L-FMAU, all human antiviral applications and uses; and
(iv) any other uses for the Compounds to which Triangle obtains rights from the
Triangle Licensors.

                  1.26 "Final Payment" shall have the meaning set forth in
Section 6.6.

                  1.27 "Fixed-Dose Combination Collaboration" shall mean an
arrangement with a Third Party relating to the manufacture, development,
inspection, use or sale of a Fixed-Dose Combination Product.

                  1.28 "Fixed-Dose Combination Product" shall mean a product
which contains one or more Compounds and one or more additional active
pharmaceutical compounds which are not Compound(s).

                  1.29 "HBV" shall mean the hepatitis B virus.

                  1.30 "HIV" shall mean the human immunodeficiency virus.

                  1.31 "IND" shall mean, with respect to a given Compound and/or
Product, the Investigational New Drug Application filed by or on behalf of
Triangle with the FDA and all subsequent submissions thereto.

                  1.32 "International Adjustment Amount" shall have the meaning
set forth in Section 6.5(d).

                  1.33 "International Marketing Board" shall have the meaning
set forth in Section 4.3 and applies to the Promotion of the Products in the
International Territory.

                  1.34 "International Product Profit" shall mean the
following: (i) with respect to the first calendar quarter of each year, the
*** in the International Territory; and (ii) with

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

                                      -6-
<PAGE>

respect to the second, third and fourth calendar quarters of each year, the
total of the *** in the International Territory for such calendar quarter and
all previous calendar quarters during such year.

                  1.35 "International Promotional Materials" shall mean all
electronic and computer managed information (including the Internet), all
written, printed or graphic materials, brochures, sales aids and other
promotional items relating to a Product approved for use in the International
Territory.

                  1.36 "International Promotion Budget" shall have the meaning
set forth in Section 4.3.

                  1.37 "International Promotion Plan" shall have the meaning set
forth in Section 4.3.

                  1.38 "International Territory" shall mean all areas of the
world outside the U.S. Territory, except that the International Territory shall
not include Japan for MKC-442 and shall not include Korea for L-FMAU.

                  1.39 "L-FMAU" shall mean the compound known as L-FMAU, with
the chemical name: *** thereof. L-FMAU is exclusively licensed to Triangle by
Bukwang Pharm. Ind. Co., Ltd. pursuant to a License Agreement dated February
27, 1998, as amended on April 1, 1999 (the "L-FMAU License Agreement"), for
use as a pharmaceutical product in all human antiviral applications and uses
for the entire world, excluding Korea.

                  1.40 "Launch" shall mean the date upon which the first
commercial sale of a Product (as evidenced by the invoice date for such sale)
occurs in each of the Territories.

                  1.41 "Legal Requirements" shall mean any and all federal,
state, local, national, supranational laws, regulations, ordinances, orders
and requirements applicable to the Parties and their Affiliates in
performance of this Agreement, including without limitation, the Securities
Exchange Act of 1934, as amended, and the Foreign Corrupt Practices Act, as
well as such laws, regulations, ordinances, orders and requirements
applicable to the sale, marketing, promotion, Detailing, and distribution of
the Products, including without limitation, the following within the U.S.
Territory: the Prescription Drug Marketing Act of 1987, the Federal Food,
Drug and Cosmetic Act, and all regulations and other requirements of the FDA.

                  1.42 "Losses" shall mean any liabilities, costs, damages,
judgments, settlements and other reasonable out-of-pocket expenses (including
legal expenses).

                  1.43 "MKC-442" shall mean the compound known as MKC-442,
with the chemical name *** thereof. MKC-442 is exclusively licensed to
Triangle by Mitsubishi Chemical Corporation pursuant to a License Agreement

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

                                      -7-
<PAGE>

dated June 17, 1997 (the "MKC-442 License Agreement") for use as a
pharmaceutical product in the entire world, excluding Japan.

                  1.44 "Major Country" shall mean *** for HIV and shall mean
*** for HBV.

                  1.45 "Major European Countries" shall mean *** .

                  1.46 "Marketing Studies" are those clinical trials and
studies which are performed essentially for marketing purposes and expressly
excludes all clinical studies and trials which are required to pursue,
obtain, and maintain Product Approval in the Territories.

                  1.47 "NDA" shall mean, in respect of each commercially
launched Product, an approved New Drug Application filed by Triangle with the
FDA and all subsequent submissions thereto.

                  1.48 "Net Units of Product Sold" shall mean the total
number of units of Product which are Sold by Abbott and permitted
sublicensees to Third Parties during the given calendar quarter or year less
*** or any *** for which *** has been *** . For any given period, the Net
Units of Product Sold shall *** for the same period. The Net Units of Product
Sold shall be calculated separately for the U.S. Territory and the
International Territory.

                  1.49 "Neutral" shall have the meaning set forth in Exhibit
20.3.

                  1.50 "Pan-European Submission" shall have the meaning set
forth in Section 3.6(b).

                  1.51 "Party" shall mean Abbott Laboratories or Triangle
Pharmaceuticals, Inc., and "Parties" shall mean Abbott Laboratories and
Triangle Pharmaceuticals, Inc., except as provided in Section 20.2.

                  1.52 "Person" shall mean a natural person, a corporation, a
partnership, a trust, a joint venture, any governmental authority, and any
other entity or organization.

                  1.53 " *** " shall mean the completion of *** of the *** of
those *** which Triangle considers reasonably necessary for the purpose of
inclusion in *** in the *** . As used in the preceding sentence, " *** "
shall mean those *** sponsored by Triangle, the primary objective of which is
to ascertain additional *** regarding the *** of a *** and *** regarding ***.

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

                                      -8-
<PAGE>

                  1.54 "Primary Details" shall mean a Detail in which the
Product being Detailed is the product most emphasized, and the first product
presented, during such Detail.

                  1.55 "Primary Enforcement Party" shall mean ***.

                  1.56 "Product Approval" shall mean (i) receipt of approval
from the FDA to market a Product in the United States and (ii) with respect to
the International Territory, the governmental approval required to market a
Product in a given country (including any pricing and reimbursement
authorization required in such country).

                  1.57 "Product Development Committee" shall have the meaning
set forth in Section 4.4.

                  1.58 "Product Patents" shall mean (a) the patents and patent
applications licensed to Triangle under the Triangle License Agreements; (b) any
patents and patent applications owned by or otherwise licensed to or controlled
by (to the extent sublicensing is permissible) Triangle during the Term which
contain claims covering or potentially covering the development, registration,
manufacture, use and sale of the Compounds or the Products (including any
intermediates or formulations thereof) within the Field of Use; and (c) all
substitutions, extensions, divisionals, continuations, continuations-in-part,
reissues, reexaminations, renewals, supplementary protection certificates or
foreign counterparts of such patents and patent applications identified in
sub-parts (a) and (b).

                  1.59 "Product Technology" shall mean the technical
information, inventions, discoveries, trade secrets, information, experience,
data, formulas, procedures, processes, know-how and results which (a) are
licensed to Triangle under the Triangle License Agreements; or (b) are owned
by or otherwise licensed to or controlled by Triangle (to the extent
sublicensing is permissible) during the Term which are necessary for the
development, registration, manufacture, use or sale of the Compounds or
Products within the Field of Use.

                  1.60 "Products" shall mean any pharmaceutical products
containing one or more Compounds as active ingredients, alone or in combination
with other active ingredients, within their respective Field of Use.

                  1.61 "Promote" or "Promotion" shall mean the act of
Detailing or otherwise advertising, marketing and promoting sales of the
Products and conducting any necessary Marketing Studies.

                  1.62 "Quarterly Reporting Period" shall mean a calendar
quarter with respect to the U.S. Territory and a fiscal quarter ending on the
final day of February, May, August, and November (as the case may be) for the
International Territory.

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

                                      -9-
<PAGE>

                  1.63 "Reasonable Best Efforts" shall mean ***. Each Party
shall be entitled to exercise *** in fulfilling its obligation to exercise
its Reasonable Best Efforts under this Agreement.

                  1.64 "Reconciliation Amount" shall have the meaning set
forth in Section 6.7.

                  1.65 "Reimbursement Account" shall have the meaning set
forth in Section 6.6(b).

                  1.66 "Sales Forecast" shall have the meaning set forth in
Section 8.2.

                  1.67 "Sales Representative" shall mean, with respect to
each Party, an individual: (i) who is regularly employed by such Party on a
full-time or part-time basis as a member of one of its sales forces or as a
medical liaison representative or, with the written consent of the other
Party, is retained on a contractual basis to act as a part of its sales
force; and (ii) who is appropriately qualified and experienced in
pharmaceutical product promotion to make effective sales presentations for
the Products.

                  1.68 "Sample Pack" shall mean a packaged and labeled
container of Product for distribution to Third Parties as samples.

                  1.69 "Secondary Detail" shall mean a Detail in which the
Product being Detailed is the second most emphasized product, and the second
product presented, during such Detail.

                  1.70 "Secondary Enforcement Party" shall mean Abbott in the
U.S. Territory and Triangle in the International Territory.

                  1.71 "Sold" or "Sale" shall mean the sale, transfer,
exchange or other disposition of Products whether by gift, or otherwise,
subsequent to Regulatory Approval in a given country (if such Regulatory
Approval is required) by Abbott or its permitted sublicensees. Sales of
Product shall be deemed consummated upon the first to occur of: (a) *** ; (b)
*** ; (c) *** ; or (d) ***. Notwithstanding the foregoing definition of Sale,
to the extent that, with the prior consent of Triangle, Abbott *** (it being
understood that no such distribution will be made without Triangle's
consent), and such distribution is at a *** , such amount shall be deemed
part of Abbott Net Sales; provided, however, that such distribution shall not
be deemed a Product Approval of such Product. The distribution of Sample
Packs shall not be deemed a Sale.

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                  1.72 "Supplemental Clinical Studies" shall have the meaning
set forth in Section 3.1.

                  1.73 "Supply Agreement" shall have the meaning set forth in
the introductory recitals to this Agreement.

                  1.74 "Term" shall have the meaning set forth in Section 16.1.

                  1.75 "Territories" shall mean the U.S. Territory and the
International Territory.

                  1.76 "Third Party" shall mean any Person that is not a Party
or an Affiliate of a Party.

                  1.77 "Transfer Price" shall mean the price for the sale of
Product by Triangle to Abbott for the U.S. Territory as determined pursuant to
Section 8.4.

                  1.78 "Transfer WAC" shall mean, with respect to each Product,
the *** for such Product in the U.S. Territory pursuant to
Section 8.4.

                  1.79 "Triangle-Abbott Alliance Agreements" shall mean this
Agreement and the following agreements entered into between the Parties of
even date herewith: (i) the Co-Promotion Agreement; (ii) the Stock Purchase
Agreement; and (iii) the Stockholder Rights Agreement. Upon negotiation, due
execution and delivery, the Supply Agreement shall also be considered one of
the Triangle-Abbott Alliance Agreements.

                  1.80 "Triangle's Cash" shall have the meaning set forth in
Section 6.6(b).

                  1.81 "Triangle Cost of Goods" shall mean the *** of *** and
*** the Net Units of Product Sold during the given calendar quarter or year,
including the *** , if any, incurred by Triangle during the given calendar
quarter or year for (i) the *** of the Compounds and Products; (ii) any ***
on the Compounds and Products, and (iii) *** and *** in the finished cost of
the Products. The Triangle Cost of Goods shall be calculated separately for
the U.S. Territory and the International Territory. All Triangle Cost of
Goods with respect to the International Territory shall be includable in
Abbott SG&A and be subject to reimbursement as provided in Section 7.9.

                  1.82 "Triangle Distribution Margin" shall mean, with
respect to the U.S. Territory, the *** and the *** with respect to the U.S.
Territory for the given calendar quarter or year. The Triangle Distribution
Margin shall be calculated only for the U.S. Territory.

                  1.83 "Triangle International Profit Amount" shall have the
meaning set forth in Section 6.5(c).

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                  1.84 "Triangle License Agreements" shall mean the MKC-442
License Agreement, the FTC License Agreement, the DAPD License Agreement and the
L-FMAU License Agreement.

                  1.85 "Triangle Licensors" shall mean Mitsubishi Chemical
Corporation with respect to MKC-442, Emory University with respect to FTC, Emory
University and the University of Georgia Research Foundation, Inc. with respect
to DAPD, and Bukwang Pharm. Ind. Co., Ltd. with respect to L-FMAU.

                  1.86 "Triangle Operating Margin" shall mean, with respect to
the U.S. Territory, the *** for the given calendar quarter
or year. The Triangle Operating Margin shall be calculated only for the U.S.
Territory.

                  1.87 "Triangle Product Sales" shall mean, with respect to the
U.S. Territory, the total aggregate Transfer Price received by Triangle from
Abbott for the Net Units of Products Sold in the U.S. Territory during the given
calendar quarter or year. The Triangle Product Sales shall be calculated only
for the U.S. Territory.

                  1.88 "Triangle SG&A" shall mean, with respect to the U.S.
Territory during the given calendar quarter or year, (i) the costs and
expenses permitted under Section 4.2 which are incurred by Triangle *** and,
to the extent permitted under Section 4.4, the Marketing Studies for the
Products during the given calendar quarter or year, in the categories set
forth in Exhibit 1.8, (ii) *** costs and expenses incurred by Triangle in
connection with claims instituted by Triangle pursuant to Section 9.5 or 9.6
in the U.S. Territory, (iii) the *** costs and expenses of ***, and (iv) such
other costs and expenses specifically included in Triangle SG&A pursuant to
the terms of this Agreement. The Triangle SG&A shall be calculated only for
the U.S. Territory.

                  1.89 "Triangle Third Party Royalties" shall mean the following
royalties paid or escrowed by Triangle with respect to the Products during a
given calendar quarter or year: (i) the Third Party royalties listed in Exhibit
1.89 which are due and payable under the Triangle License Agreements and (ii)
*** . The Triangle Third Party Royalties shall be
calculated separately for the U.S. Territory and the International Territory and
shall be paid *** .

                  1.90 "Triangle Trademarks" shall have the meaning set forth in
Section 14.1.

                  1.91 "Triangle U.S. Profit Amount" shall have the meaning set
forth in Section 6.4(c).

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                  1.92 "U.S. Adjustment Amount" shall have the meaning set forth
in Section 6.4(d).

                  1.93 "U.S. Co-Promotion Budget" shall have the meaning set
forth in Section 4.2.

                  1.94 "U.S. Co-Promotion Plan" shall have the meaning set forth
in Section 4.2.

                  1.95 "U.S. Marketing Board" shall have the meaning set forth
in Section 4.2 and applies to the Co-Promotion of the Products in the U.S.
Territory.

                  1.96 "U.S. Product Profit" shall mean the following: (i)
with respect to the first calendar quarter of each year, the total of the ***
and the *** for such calendar quarter and (ii) for the second, third and
fourth calendar quarters of each year, the total, for the subject calendar
quarter and each previous calendar quarter during such calendar year, of the
*** and the *** .

                  1.97 "U.S. Promotional Materials" shall mean all electronic
and computer managed information (including the Internet), all written, printed
or graphic materials, brochures, sales aids and other promotional items relating
to a Product approved for use in the U.S. Territory.

                  1.98 "U.S. Territory" shall mean the United States of America,
*** .

                  1.99 "Valid Claim" shall mean (a) an issued claim of any
unexpired patent including among the Product Patents, or (b) a pending claim of
any pending patent application included among the Product Patents, which has not
been held unenforceable, unpatentable or invalid by a decision of a court or
governmental body of competent jurisdiction, unappealable or unappealed within
the time allowed for appeal, which has not been rendered unenforceable through
disclaimer or otherwise or which has not been lost through an interference
proceeding.

                  1.100 "WAC" shall have the meaning set forth in Section 8.4.

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                                   ARTICLE 2

                           DISTRIBUTION AND PROMOTION

                  2.1 EXCLUSIVE DISTRIBUTOR. Except as and to the extent
otherwise specified in this Agreement, Triangle hereby appoints Abbott, and
Abbott hereby accepts appointment, as the exclusive distributor of the
Products in the U.S. Territory and the International Territory, with the sole
and exclusive right to commercially sell and distribute the Products to Third
Parties within the U.S. Territory and the International Territory. Abbott
shall *** of the Products in the *** . Subject to Section 2.4, Abbott may ***
in the ***.

                  2.2 PROMOTION. Except as and to the extent otherwise specified
in this Agreement, Triangle hereby grants to Abbott, and Abbott hereby accepts,
(i) the exclusive right to Co-Promote the Products in the U.S. Territory jointly
with Triangle and (ii) the exclusive right to Promote the Products in the
International Territory. Neither Abbott nor Triangle shall appoint any Third
Party to act on its behalf with respect to the Detailing of the Products in the
U.S. Territory. Subject to Section 2.4, Abbott may appoint Third Parties to
Promote in the International Territory.

                  2.3 LICENSE.

                    (a) Subject to the terms of this Agreement, Triangle
               hereby grants Abbott a license *** to utilize the Product
               Patents and the Product Technology to offer to sell and sell
               the Products within the Field of Use in the U.S. Territory and
               to otherwise perform any duties and obligations that Abbott is
               required or permitted to perform under this Agreement in the
               U.S. Territory. Such license shall be co-exclusive with
               Triangle except as to (i) *** specified in the *** (as defined
               in the ***), (iii) rights contemplated in Sections 2.6 and
               3.6, and (iv) any rights of the U.S. Government described in
               the Triangle License Agreements.

                    (b) Subject to the terms of this Agreement, Triangle
               hereby grants Abbott a license *** to utilize the Product
               Patents and the Product Technology to import, use, offer to
               sell, sell and, subject to the negotiation and execution of
               the Supply Agreement, to make and have made, the Compounds and
               Products within the Field of Use in the International
               Territory and to otherwise perform any duties and obligations
               that Abbott is required or permitted to perform under this
               Agreement in the International

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               Territory. Such license shall be exclusive except as to (i)
               Triangle and its Third Party manufacturers so as to perform
               any obligations or activities that Triangle is required or
               permitted to perform under this Agreement, (ii) *** as
               specified in the *** (as defined in the *** ), (iii) rights
               contemplated in Sections 2.6 and 3.6, and (iv) any rights of
               the U.S. Government described in the Triangle License
               Agreements.

                    (c) Abbott hereby grants Triangle *** (other than *** )
               right and license to utilize the Abbott Technology and Abbott
               Patents to make, have made, import, use, offer to sell and
               sell the Compounds and Products within the Field of Use. In
               the case of *** , such license shall apply only to (i)
               countries outside of the Territories and (ii) any country in
               which the *** .

                  2.4 USE OF THIRD PARTIES. Except as provided in this
Sections 2.4 and 20.2, Abbott shall not have the right to grant sublicenses
without the prior express consent of Triangle, *** , and, to the extent
required, the applicable Triangle Licensor, in which event Triangle shall ***
with Abbott in its efforts to obtain the consent of the applicable Triangle
Licensor. Notwithstanding the prior sentence, Abbott shall have the right,
*** , to enter into agreements concerning the distribution and/or Promotion
of the Products to the extent that sales or other activities by such a Person
would not be included for purposes of calculating Triangle Third Party
Royalties pursuant to the terms of the applicable Triangle License Agreement.
No sublicense granted by Abbott shall relieve it of any obligation hereunder.

                  2.5 RIGHTS TO ADDITIONAL PRODUCTS. Triangle hereby grants
to Abbott, and Abbott hereby accepts, a right of first discussion with
respect to all pharmaceutical compounds, which are licensed to or developed
by Triangle (regardless of their stage of development) up until December 31,
2005. If Triangle desires to sell the rights to or out-license such compound,
*** , as the case may be, *** such compound, subject to the *** as provided
in this Section 2.5. Otherwise, such right shall include the *** as provided
in this Section 2.5. At the *** for such compound, or earlier *** , or from
time to time ***

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                                      -15-
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for the same or a similar proposed transaction), Triangle shall prepare and
submit to Abbott *** , which shall consist of all *** , including (to the
extent available) *** and ***. Within *** after the receipt of the *** it is
*** If *** , the Parties shall, *** under the general conditions set forth in
this Section 2.5. In the event that *** shall be free to commercialize the
compound itself or to grant rights covered by such right of first discussion
to any Third Party. If *** but the Parties are *** , within *** from the
delivery of such notice, then until *** (i) *** or (ii) *** from the delivery
of such notice, *** . If *** pursuant to the immediately preceding sentence,
then *** . Any information regarding any compound offered to Abbott under
this Section 2.5 shall be subject to the confidentiality and nondisclosure
obligations set forth in Article 13. *** in accordance with the provisions of
this Section 2.5. Notwithstanding Section 20.2, references in this Section
2.5 to Abbott shall be deemed to refer only to Abbott Laboratories.

                  2.6 COMBINATION PRODUCTS.

                    (a) *** , and ***, and it is each Party's intent to ***
               of *** . Triangle agrees to keep Abbott fully apprised of its
               activities with any Third Party concerning the development of
               *** , and Abbott shall have the right

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                                      -16-
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               to provide input with respect to these activities and, to the
               extent reasonably possible, the right to participate in
               meetings with such Third Party regarding such activities.

                    (b) Triangle may enter into any Fixed-Dose Combination
               Collaboration without Abbott's prior written consent if each
               of the following conditions is met: (i) the relevant
               Fixed-Dose Combination Product would be *** in accordance with
               the terms of the Triangle-Abbott Alliance Agreements ( *** )
               contained in the Fixed-Dose Combination Product are supplied
               by a Third Party); (ii) all of the *** received by the Parties
               on account of the Compound(s) contained in the Fixed-Dose
               Combination Collaboration are ***; and (iii) the rights set
               forth in clause (i) above apply throughout the Territories or
               substantially all of the Territories (i.e., *** of the unit
               market for the Fixed-Dose Combination Product) in the
               Territories, (iv) the *** , and (v) the *** of the *** therein
               when *** (or *** ), all determined on *** .

                    (c) *** enter into a Fixed-Dose Combination Collaboration
               which does not satisfy each of the conditions set forth in
               Section 2.6(b) *** .

                    (d) Nothing in this Section 2.6 shall in any way restrict
               Triangle from entering into discussions with Third Parties
               regarding the viability of one or more Fixed-Dose Combination
               Collaborations including, but not limited to, exchanging data
               and information (e.g., Product Technology) regarding the
               potential Fixed-Dose Combination Product and undertaking
               feasibility studies relating to the such Fixed-Dose
               Combination Product. All reasonable and necessary expenses
               incurred by Triangle relating to the viability of such
               Fixed-Dose Combination Collaboration shall be *** , unless
               such Fixed-Dose Combination Collaboration is entered into
               pursuant to Section 2.6(b) or (c) or otherwise with Abbott's
               consent,

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               in which case, upon the execution of the Fixed-Dose
               Combination Collaboration agreement by Triangle, Abbott shall
               reimburse Triangle for *** of all reasonable and necessary
               expenses incurred by Triangle. All expenses incurred after any
               Fixed-Dose Combination Collaboration is entered into pursuant
               to Section 2.6(b) or (c) or otherwise with Abbott's consent
               *** . Other than as permitted pursuant to this Section 2.6,
               neither Party shall have the right to enter into a Fixed-Dose
               Combination Collaboration.

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                                   ARTICLE 3

                CLINICAL DEVELOPMENT, PRODUCT APPROVAL AND LAUNCH

                  3.1 CLINICAL DEVELOPMENT. Subject to the terms of this
Agreement, Triangle shall exercise its Reasonable Best Efforts to pursue, and
shall bear the full cost and expense of, the clinical development of the
Products for the U.S. Territory and the International Territory, including
exercising its Reasonable Best Efforts to (i) perform all clinical studies
and trials, (ii) generate all safety, toxicology and efficacy data required
to pursue, obtain and maintain Product Approval in the U.S. Territory and the
International Territory and (iii) obtain, as promptly as practicable after
Product Approval in the United States, *** for each Product in the U.S.,
subject, however, to limitations on the shelf life because of the particular
characteristics of each such Product. Notwithstanding the preceding sentence,
if the performance of clinical studies or trials or the generation of safety,
toxicology and efficacy data is required to pursue, obtain and maintain
Product Approval in a country in the International Territory which is not a
Major Country, which studies, trials or data are not also required to pursue,
obtain and maintain Product Approval in the U.S. Territory or a Major Country
(a "Supplemental Clinical Study"), then, if Abbott determines to proceed with
Product Approval in such country, the costs and expenses of any such
Supplemental Clinical Study shall be *** and excluded from both *** .
Triangle shall keep Abbott fully apprised with respect to its clinical
development activities and shall provide Abbott with the opportunity for
input regarding these activities, including *** relating to all clinical
studies. Triangle shall control all decisions regarding such clinical
development activities in the Territories. Triangle shall use its Reasonable
Best Efforts to provide, on an on-going basis, appropriate primary documents
(in English) to Abbott in connection with Abbott's efforts to pursue, obtain
and maintain Product Approval in each Major Country and such other countries
within the International Territory *** , including providing certificates of
free sale to Abbott and other legal documents, certificates, Product samples,
study reports, regulatory overviews, statistical overviews, and other
regulatory documents as prepared.

                  3.2 U.S. PRODUCT APPROVAL. Triangle shall exercise its
Reasonable Best Efforts to file, obtain and maintain Product Approval for the
Products in the United States, and shall bear the full cost and expense
thereof. Triangle shall keep Abbott fully apprised with respect to its
Product Approval activity in the United States. Specifically, Triangle shall
(i) ***, (ii) to the extent reasonably practicable, provide *** and consider,

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at Triangle's sole discretion, Abbott's *** , and (iii) allow *** , to the
extent permitted by the *** . Triangle shall control all decisions regarding
its regulatory activities in the United States, including, without
limitation, decisions regarding the filing, obtaining and maintaining of
Product Approval for the Products in the United States.

                  3.3 INTERNATIONAL PRODUCT APPROVAL. Abbott shall exercise
its Reasonable Best Efforts to file, obtain and maintain Product Approval for
the Products in the International Territory, and shall bear the full cost and
expense thereof. Abbott shall use its Reasonable Best Efforts to pursue the
filing, obtaining and maintaining of Product Approval in all Major Countries
and such other countries within the International Territory as ***
appropriate. Abbott shall keep Triangle fully apprised with respect to its
Product Approval activities in the International Territory and shall provide
Triangle with the opportunity for input with respect to such international
Product Approval activities. Specifically, Abbott shall (i) provide Triangle
with a copy of the *** and, upon Triangle's reasonable request on a
country-by-country basis, a copy of filings, documents, and correspondence
with regulatory authorities concerning the Compounds or Products  *** ,
(ii) to the extent reasonably practical, provide *** with regulatory
authorities in the Major Countries in which strategies, approval issues or
major scientific issues may be reviewed concerning the Compounds or Products
and consider, ***, and (iii) for Compounds or Products sourced from Abbott
under the Supply Agreement, provide Triangle with a copy of any inspection
reports relating to Abbott's, its Affiliates' or any Third Party's
manufacture of Compound or Product and allow *** manufacturing facilities, to
the extent permitted by the *** . Abbott shall control all decisions
regarding such regulatory activities in the International Territory.

                  3.4 REASONABLE COOPERATION. Each Party shall provide the other
Party with all reasonable assistance requested by the other Party with respect
to the foregoing clinical development and regulatory activities. The Party
providing such assistance shall be reimbursed by the other Party for its
reasonable out-of-pocket costs and expenses.

                  3.5 LAUNCH. The Parties shall use their Reasonable Best
Efforts to Launch and Co-Promote each Product in the U.S. Territory within
*** from the date of Product Approval in the United

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States. Abbott shall use its Reasonable Best Efforts to Launch and Promote
each Product in each country of the International Territory within *** from
the date of Product Approval in such country.

                  3.6 TRIANGLE ASSUMPTION RIGHTS.

                    (a) Once a Product has been Launched in the U.S.
               Territory, if Abbott determines not to Launch such Product in
               a given country in the International Territory or otherwise
               fails to Launch such Product within *** after receipt of
               Product Approval in such country, then Triangle may elect, by
               *** prior written notice to Abbott, to terminate (unless
               Abbott Launches the Product in such country during such ***
               notice period) Abbott's rights under this Agreement to Promote
               such Product in such country (including a termination of the
               license granted to Abbott hereunder with respect to such
               Product in such country), in which event Triangle may itself,
               or through one or more Third Parties, Launch and Promote such
               Product in such country outside of the scope of this
               Agreement; *** (i) the *** if any, in any country that is now
               or may be in the future a member of the European Union, or
               (ii) in the event that Abbott has not obtained Product
               Approval in any country in the European Union, the *** of the
               *** in the *** with the *** of such Product or, if there are
               fewer than *** countries in which there is Product Approval
               for such Product, the *** ; provided, further, that if Abbott
               subsequently obtains Product Approval for such Product in a
               country in the European Union, Triangle shall use its
               Reasonable Best Efforts to *** of the Product in such country
               to the level provided in clause (i) above. Notwithstanding the
               foregoing, if Abbott is in the process of *** with the
               applicable regulatory authorities in such country, Abbott may
               request, prior to the expiration of the above-referenced ***
               period, an extension of up to an additional *** , subject to
               the consent of Triangle, not to be unreasonably withheld, as
               well as an additional *** , subject to Triangle's consent (i)
               at its sole discretion if a non-Major Country or (ii) in its
               reasonable discretion if a Major Country; provided that either
               such extension shall automatically terminate upon *** . At the
               request of Triangle, Abbott shall promptly provide ***
               requested by Triangle.

                    (b) With respect to any Major Country in the International
               Territory, Triangle will notify Abbott when Triangle reasonably
               determines that Triangle has delivered to Abbott a set of primary
               documents in respect of a given Product which is sufficiently
               complete to enable Abbott

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               to prepare a submission for Product Approval in such Major
               Country. Abbott shall have *** from the date of receipt of the
               Triangle notice referred to in the immediately preceding
               sentence in which to determine whether such primary documents
               are sufficiently complete.

                         (i) If Abbott determines that such primary documents
                    are sufficiently complete, subject to the provisions set
                    forth below, Abbott shall have *** within which to
                    prepare and make a Product Approval submission for such
                    Product for all Major European Countries (the
                    "Pan-European Submission") and *** to prepare and make
                    submissions in a non-European Major Country. Failure by
                    Abbott to notify Triangle of a deficiency within such ***
                    period shall be deemed to constitute notice that such
                    primary documents are sufficiently complete.

                         (ii) If Abbott determines, in good faith, within
                    such *** period that such primary documents are not
                    sufficiently complete, it shall notify Triangle to this
                    effect, which notice shall specify the deficiency. The
                    *** and *** time periods specified in clause (i) above
                    shall not commence until such time as Triangle cures the
                    deficiency. In the event the Parties disagree as to
                    whether a deficiency exists, they shall attempt to
                    resolve the dispute and any unresolved dispute shall be
                    subject to Section 20.3.

                         (iii) The periods set forth in clause (i) shall be
                    tolled if the applicable regulatory authority determines
                    there exists a material deficiency in the primary documents
                    or Product Approval submission, as applicable (and the
                    deficiency did not arise as a result of Abbott's failure to
                    perform its obligations hereunder), and shall be restarted
                    when such deficiency is cured; provided, however, that
                    Abbott shall be entitled to a reasonable period of time to
                    complete such submission, which period shall be mutually
                    agreed upon by the Parties. Abbott shall promptly notify
                    Triangle in the event Abbott receives notice of deficiency
                    from any regulatory authority, including the specific
                    details thereof.

                         (iv) In the event Abbott fails to make a Product
                    Approval submission within the time allowed therefor
                    pursuant to this Section 3.6(b), *** The foregoing ***.

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                    (c) Notwithstanding the foregoing provisions of this Section
               3.6, Abbott shall not be deemed to have failed to Launch a
               Product pursuant to paragraph (a) or to have failed to file for
               Product Approval in paragraph (b), if such failure resulted from
               an event of Force Majeure pursuant to Article 19.

                  3.7 EXCUSED PERFORMANCE. The Parties acknowledge and
understand that the development, registration and marketing of the Products, as
with any pharmaceutical product, is subject to certain inherent risks including
that (a) the Products will be ineffective, toxic, or will not receive Product
Approval; (b) the Products will be too expensive to manufacture or market or
will not achieve broad market acceptance; (c) Third Parties will hold
proprietary rights that will preclude the marketing and sale of the Product; or
(d) Third Parties will market equivalent or superior products. Neither Party
makes any representation or warranty that the Products (i) will be successfully
developed; (ii) will receive all necessary Product Approvals; (iii) will be
Launched; or (iv) will be commercially successful. The respective obligations of
the Parties under this Article, and Articles 4 and 5 with respect to any
Product, are expressly conditioned upon the safety, efficacy and commercial
feasibility of such Product, and a Party's obligation hereunder shall be delayed
or suspended for so long as any condition or event exists which reasonably
causes a Party to question the safety, efficacy or commercial feasibility of any
Product. Furthermore, Abbott's obligation to market and Promote the Products in
a country in the International Territory shall not apply if Abbott has not
commenced or has ceased marketing such Product in such country substantially due
to adverse business or financial conditions, including those caused by the
regulatory authorities or other governmental authorities of such country, which
would cause the marketing of such Product in such country to be contrary to the
financial best interest of the Parties, including not commencing marketing in a
country where the regulatory authorities or other governmental authorities have
price approval or reimbursement authority and the price approved or proposed or
the reimbursement granted is unacceptable to Abbott in its reasonable commercial
judgment. Each Party shall promptly notify the other Party in the event any
material issue arises as to the safety, efficacy, commercial feasibility, or
adverse business or financial conditions with respect to any Product.

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                                   ARTICLE 4

                           CO-PROMOTION AND PROMOTION

                  4.1 MARKETING EFFORT. Abbott and Triangle shall use their
Reasonable Best Efforts to Co-Promote the Products in the U.S. Territory, and
Abbott shall use its Reasonable Best Efforts to Promote the Products in the
International Territory. Triangle shall be the lead Party for implementation of,
and shall make tactical decisions with regard to, Co-Promotion in the U.S.
Territory, consistent with the terms of this Agreement, the then current U.S.
Co-Promotion Plan and U.S. Promotional Materials and any applicable direction
provided by the U.S. Marketing Board. Abbott shall use its Reasonable Best
Efforts to implement, and shall make tactical decisions with regard to,
Promotion in the International Territory, consistent with the terms of this
Agreement, the then current International Promotion Plan and International
Promotional Materials and any applicable direction provided by the International
Marketing Board.

                  4.2 U.S. TERRITORY

                    (a) U.S. MARKETING BOARD. Abbott and Triangle shall work
               together to Co-Promote the Products in the U.S. Territory and
               shall present their views on the Co-Promotion of each Product
               through a committee (the "U.S. Marketing Board") which shall
               oversee and direct the Co-Promotion of the Products in the U.S.
               Territory. The U.S. Marketing Board shall review and approve
               strategies for the Co-Promotion of the Products and undertake the
               activities necessary to implement those strategies in accordance
               with a U.S. Co-Promotion Plan and U.S. Promotional Materials
               (including by coordinating the Parties' Detailing messages and
               methodologies, physician, trade and managed care targeting and
               call programs and efforts). The U.S. Marketing Board shall
               observe the following rules:

                         (i) The U.S. Marketing Board, consisting of a total
                    of not more than *** , shall include an equal number of
                    representatives from Abbott and Triangle and shall be
                    permanently chaired by a Triangle representative. Each
                    Party's representatives on the U.S. Marketing Board shall
                    be full-time employees of such Party. Each party shall be
                    permitted to have an additional non-voting observer from
                    the International Marketing Board participate in any
                    meeting. Abbott shall designate a lead representative on
                    the U.S. Marketing Board, who shall be authorized by
                    Abbott to communicate with the Triangle chairperson
                    between meetings of the U.S. Marketing Board, to make
                    decisions as needed. Each Party shall have the right, at
                    any time, to

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                    designate by written notice to the other Party, a
                    replacement, on a permanent or temporary basis, for any of
                    such Party's members on the U.S. Marketing Board, including
                    the chairperson.

                         (ii) Except for (A) the establishment of the U.S.
                    Co-Promotion Budget which is reserved for the mutual
                    agreement of the Parties, (B) the pricing of the Products to
                    the Third Party customers, which shall be determined
                    pursuant to Section 8.4, and (C) the location of the Abbott
                    Sales Representatives, which shall be determined by Abbott,
                    Triangle shall be responsible for making all final decisions
                    related to the Co-Promotion of the Products in the U.S.
                    Territory. The U.S. Marketing Board shall endeavor to work
                    by consensus; provided that the decisions of the chairperson
                    shall be deemed the final decisions of the Board in all
                    circumstances. Each Party shall use Reasonable Best Efforts
                    to implement the final decisions of the U.S. Marketing
                    Board.

                         (iii) In addition to the members of the U.S. Marketing
                    Board, it is understood that from time to time additional
                    personnel having specialized experience and training shall
                    be requested to assist the U.S. Marketing Board, including
                    finance, legal, and regulatory affairs. Such additional
                    personnel may be added to a U.S. Marketing Board meeting by
                    invitation of the chairperson; provided, however, that if
                    the chairperson invites one or more specialists from one
                    Party, it shall extend a like invitation to similar
                    specialists from the other Party.

                         (iv) The U.S. Marketing Board shall meet as
                    necessary, but such committee shall meet at least *** .
                    The site for such meetings shall alternate between
                    Durham, North Carolina, and Abbott Park, Illinois, or
                    such other location agreed to by the Parties. Meetings
                    may also take place by telephonic or video conference.
                    The chairperson shall send to the members of the U.S.
                    Marketing Board a notice of each meeting at least ten
                    (10) business days prior to the date of such meeting. The
                    chairperson shall endeavor to coordinate the timing and
                    place of scheduled meetings of the U.S. Marketing Board
                    with those of the International Marketing Board.

                         (v) Any member of the U.S. Marketing Board may send to
                    the chairperson, at least seven (7) business days before a
                    meeting date, proposed topics to be discussed at such
                    meeting. At least five (5) business days before the meeting
                    date, the chairperson shall prepare and distribute an Agenda
                    for such meeting of the topics to be discussed at such
                    meeting and a list of any non-member specialists who have
                    been invited to such

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                    meeting. Within ten (10) business days after such meeting,
                    the chairperson shall prepare and distribute draft action
                    steps and decisions of the meeting to all members of the
                    U.S. Marketing Board. Within five (5) business days of the
                    date on which the action steps and decisions were
                    distributed, the members shall either note their approval or
                    submit proposed revisions to the draft. Not more than five
                    (5) business days after the receipt of all approvals or
                    proposed revisions, the chairperson shall issue the final
                    action steps and decisions of the U.S. Marketing Board.

                         (vi) Each Party shall bear its own costs, including
                    travel costs, for its personnel serving on the U.S.
                    Marketing Board or attending any meeting of the U.S.
                    Marketing Board.

                    (b) U.S. CO-PROMOTION BUDGET. Each year the Parties shall
               reach written agreement on an annual budget for each Product
               (the "U.S. Co-Promotion Budget"), which shall set forth in
               appropriate detail, the costs and expenses to be incurred
               pursuant to subpart (i) of Section 1.8 (Abbott SG&A) and
               subpart (i) of Section 1.88 (Triangle SG&A). The initial U.S.
               Co-Promotion Budget shall be approved within *** of the
               Effective Date and each subsequent annual U.S. Co-Promotion
               Budget shall be approved by *** for the following Annual
               Reporting Period for the U.S. Territory. The U.S. Co-Promotion
               Budget shall be expended consistent with the strategies
               outlined in the U.S. Co-Promotion Plan, allowing for
               management discretion in the implementation of specific
               tactical components. The approved U.S. Co-Promotion Budget for
               a Product may be adjusted at any time upon the written
               agreement of the Parties.

                    (c) U.S. CO-PROMOTION PLAN. With input from the U.S.
               Marketing Board, Triangle will use its Reasonable Best Efforts to
               prepare and implement an annual plan (the "U.S. Co-Promotion
               Plan") for the Co-Promotion of the Products in the U.S.
               Territory. The U.S. Marketing Board shall review and approve, and
               oversee the implementation of, the U.S. Co-Promotion Plan;
               provided that Triangle shall be responsible for making all final
               decisions relating to the implementation of the U.S. Co-Promotion
               Plan. The U.S. Co-Promotion Plan shall specify for each Product
               the number and type of Details (i.e., Primary Details and
               Secondary Details) to be performed by each Party's Sales
               Representatives which are included in such Party's SG&A account
               hereunder (the "Detailing Commitment"), the sampling program for
               the Products, the Discretionary Funds available to the Sales
               Representatives, any Marketing Studies for the Product, medical
               education programs and special marketing incentive programs;
               provided, however, that,

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               unless expressly agreed otherwise by the Parties, the Abbott
               Sales Representatives and the Triangle Sales Representatives
               shall be treated in a like and equal manner such that: (i) ***
               shall be the same for both Parties; (ii) ***  per Sales
               Representative shall be identical for both sales forces; (iii)
               *** per Sales Representative shall be the same for both
               Parties; and (iv) *** per Sales Representative shall be
               identical for both sales forces. In preparing the U.S.
               Co-Promotion Plan, the U.S. Marketing Board shall use its
               Reasonable Best Efforts to coordinate its activities with the
               Co-Promotion Committee (as defined in the Co-Promotion
               Agreement) with respect to its preparation of the Co-Promotion
               Plan (as defined in the Co-Promotion Agreement).

                  (d) U.S. SALES REPRESENTATIVES.

                         (i) Under the U.S. Co-Promotion Budget and the U.S.
               Co-Promotion Plan, Abbott shall maintain *** Sales
               Representatives to Co-Promote hereunder (measured on a full
               time equivalent basis), except as provided in Section
               4.2(d)(ii), and Triangle shall be authorized to maintain
               *** Sales Representatives to Co-Promote hereunder (measured on
               a full time equivalent basis). *** shall be authorized to ***
               ), as part of the *** ; provided, that to the extent that
               either ***. The U.S. Marketing Board may not reduce the number
               of Abbott's Sales Representatives Co-Promoting the Products
               below *** full time equivalents without the written consent of
               Abbott. Each Party may dedicate more than *** Sales
               Representatives (measured on a full time equivalent basis) to
               Co-Promote the Products in the U.S. Territory, but may not
               include any of the costs and expenses attributable thereto in
               the Abbott SG&A or the Triangle SG&A, except as provided in
               Section 4.2(d)(ii). Each of Abbott and Triangle shall be
               authorized to account for no more than *** , on a fully
               allocated cost per full time equivalent basis, as part of the
               Abbott SG&A and Triangle SG&A, respectively.

                         (ii) Following the *** full calendar year after the
               Launch of the first Product in the U.S. Territory, Abbott may,
               with ***

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                    written notice to Triangle prior to the commencement of
               any calendar year, elect to *** its sales force commitment
               below *** Sales Representatives (measured on a full time
               equivalent basis) in whole increments of *** , which election
               shall be effective for such calendar year; provided that
               Triangle may thereafter *** from time to time the number of
               its Sales Representatives Co-Promoting hereunder (measured on
               a full time equivalent basis) to the extent that the aggregate
               number of Triangle and Abbott Sales Representatives
               Co-Promoting hereunder does not *** Sales Representatives
               (measured on a full time equivalent basis). Abbott may, with
               *** written notice to Triangle prior to the commencement of
               any subsequent calendar year, elect to *** its sales force
               commitment in whole increments of *** Sales Representatives
               (measured on a full time equivalent basis); provided that such
               *** shall be permitted only to the extent that the aggregate
               number of Triangle and Abbott Sales Representatives
               Co-Promoting hereunder does not *** Sales Representatives
               (measured on a full time equivalent basis), including any ***
               Sales Representatives *** by Triangle in accordance with the
               prior sentence. In the event that Abbott *** the number of its
               Sales Representatives Co-Promoting hereunder (measured on a
               full time equivalent basis) *** , Triangle may, with *** prior
               written notice to Abbott, elect to assume the exclusive right
               to Promote the Products hereunder in the U.S. Territory. In
               the event Triangle *** its Sales Representatives or assumes
               the Promotion of the Products as provided in this Section
               4.2(d)(ii), the costs and expenses of its *** Sales
               Representatives (to the extent that the aggregate number of
               Abbott Sales Representatives and Triangle Sales
               Representatives does not *** measured on a full time
               equivalent obasis) shall be included in Triangle SG&A.

                         (iii) Each Party shall be responsible for staffing,
                    selling skills training, supervising, and compensating
                    (including incentives) its own Sales Representatives.
                    With respect to training, Triangle shall make available
                    to Abbott, *** , the same kinds and amounts of
                    Product-specific training materials that it provides for
                    its own Sales Representatives. Both Parties shall
                    re-train their personnel in the promotion of the Products
                    from time to time as set forth in the U.S. Co-Promotion
                    Plan. Each Party shall reward its Sales Representatives (
                    *** ) for promoting the Products through an
                    incentive-based compensation system. For Abbott

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                    such system shall be ***. For Triangle, its system shall
                    be ***. Each Party shall have full control over and be
                    responsible for the salary, incentives, benefits and
                    other employment matters related to its Sales
                    Representatives.

                    (e) U.S. CO-PROMOTION EFFORT. Each Party shall use its
               Reasonable Best Efforts to perform those tasks and
               responsibilities assigned to such Party in the U.S.
               Co-Promotion Plan, including performing at least their
               respective Detailing Commitments, and each Party shall use its
               Reasonable Best Efforts to support the Co-Promotion of the
               Products in the U.S. Territory. The Detailing of a Product
               shall commence upon the Launch of such Product. Each Party may
               perform Details throughout the U.S. Territory. The U.S.
               Marketing Board shall coordinate the Parties' Detailing
               activities so as to maximize Product sales by maximizing
               geographic coverage, ensuring that the geographic disbursement
               of the Details is not unduly burdensome on either Party,
               eliminating unnecessary duplication, and ensuring that the
               potential for a proportionate number of prescriptions shall be
               generated by the respective sales forces. The U.S. Marketing
               Board shall also coordinate the managed care efforts of the
               Parties in the U.S. Territory as outlined in the U.S.
               Co-Promotion Plan so as to maximize Product sales *** . In
               connection with the Co-Promotion of the Products in the U.S.
               Territory, both Parties shall participate in conventions, and
               continuing educational programs for health care professionals,
               and the effort of the Parties in this regard shall be
               coordinated by the U.S. Marketing Board.

                    (f) U.S. SAMPLING. As part of the Co-Promotion of the
               Products in the U.S. Territory, each Party may distribute Sample
               Packs free of charge to health care professionals on an ongoing
               basis in accordance with the sampling program as outlined in the
               U.S. Co-Promotion Plan and approved by the U.S. Marketing Board
               and all Legal Requirements. Each Party shall maintain all records
               required pursuant to the Prescription Drug Marketing Act of 1987,
               including maintenance of written requests and delivery receipts
               for any Sample Packs delivered to its sales force for so long as
               required by such Act. Abbott shall promptly report to Triangle
               any thefts of

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               Sample Packs or any losses of Sample Packs. Triangle shall be
               responsible for providing to both sales forces the quantities of
               Sample Packs set forth in the U.S. Co-Promotion Plan.

                    (g) U.S. PROMOTIONAL MATERIALS. Triangle shall internally
               review the U.S. Promotional Materials from a medical and legal
               perspective and shall prepare and provide the quantity and types
               of U.S. Promotional Materials set forth in the U.S. Co-Promotion
               Plan. The Parties shall disseminate in the U.S. Territory only
               those promotional and advertising materials which have been
               approved for use by the U.S. Marketing Board. All such materials
               shall be consistent with the U.S. Co-Promotion Plan approved by
               the U.S. Marketing Board. Abbott shall not be required to use
               U.S. Promotional Materials which are prohibited under applicable
               FDA regulations. Abbott and Triangle shall use the same U.S.
               Promotional Materials in connection with the Co-Promotion of the
               Products.

                    (h) COMPLIANCE WITH LAW. Each Party shall cause its sales
               force, and all other employees and approved agents and
               representatives, to comply with all applicable laws, regulations
               and guidelines in connection with the Co-Promotion of the
               Products in the U.S. Territory, including, without limitation,
               the Prescription Drug Marketing Act and the Federal Anti-Kickback
               Statute. Each Party shall cause its sales force, in the course of
               its Co-Promotion of the Products, to (i) limit its claims of
               efficacy and safety for Products to those which are consistent
               with the U.S. Marketing Board's then approved product circular
               for the Products or as otherwise approved by the U.S. Marketing
               Board consistent with Legal Requirements, (ii) not delete or
               modify claims of efficacy and safety in the Co-Promotion of
               Products so that they are different in any way from those which
               are contained in the U.S. Marketing Board's then approved product
               circular for the Products, or make any changes in promotional
               materials and literature provided by the U.S. Marketing Board,
               and (iii) not knowingly or recklessly do anything which will
               jeopardize the goodwill or reputation of the Products or the
               other Party. In addition, each Party shall exercise its
               Reasonable Best Efforts to conduct the Co-Promotion of the
               Products in adherence to the American Medical Association Gifts
               to Physicians From Industry Guidelines.

                  4.3 INTERNATIONAL TERRITORY.

                    (a) INTERNATIONAL MARKETING BOARD. Abbott and Triangle shall
               work together to develop a plan for the Promotion of the Products
               by Abbott in the International Territory through a committee (the
               "International Marketing Board") which shall oversee and direct
               the Promotion of the Products in the International Territory. The
               International Marketing Board shall review and approve strategies
               for the Promotion of the Products and undertake the activities
               necessary to

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               implement those strategies in accordance with an International
               Promotion Plan and International Promotional Materials. The
               International Marketing Board shall follow the rules established
               by Section 4.2(a)(i) through (vi) for the U.S. Marketing Board,
               except that (i) an Abbott representative shall permanently chair
               the International Marketing Board, (ii) Abbott shall be
               responsible for making all final decisions relating to the
               implementation of the International Promotion Plan, (iii)
               Triangle shall designate a lead representative on the
               International Marketing Board, who shall be authorized by
               Triangle to communicate with the Abbott chairperson between
               meetings of the International Marketing Board, to make decisions
               as needed, (iv) in all instances references to the U.S.
               Co-Promotion Budget shall mean the International Promotion
               Budget, and (v) in all instances references to "U.S." and
               "International" shall be reversed.

                    (b) INTERNATIONAL PROMOTION BUDGET. Each year the Parties
               shall reach written agreement on an annual budget for each
               Product (the "International Promotion Budget"), which shall
               set forth the costs and expenses to be incurred in the cost
               categories set forth in subpart (i) of Section 1.8 (Abbott
               SG&A). The initial International Promotion Budget shall be
               approved within *** after the Effective Date and each
               subsequent annual International Promotion Budget shall be
               approved by *** for the following Annual Reporting Period for
               the International Territory. The International Promotion
               Budget shall be expended consistent with the strategies
               outlined in the International Promotion Plan, allowing for
               management discretion in the implementation of specific
               tactical components. The approved International Promotion
               Budget for a Product may be adjusted at any time upon the
               written agreement of the Parties.

                    (c) INTERNATIONAL PROMOTION. Abbott shall use its Reasonable
               Best Efforts to Promote the Products in the International
               Territory in accordance with the International Promotion Plan
               and, to the extent possible, coordinate its promotional
               activities and methods in the International Territory with those
               used by the Parties in the U.S. Territory. With input from the
               International Marketing Board, Abbott will exercise its
               Reasonable Best Efforts to prepare and implement an annual plan
               (the "International Promotion Plan") for the Promotion of the
               Products in the International Territory. The International
               Marketing Board shall review and approve the International
               Promotion Plan. Abbott shall cause its sales force, and all other
               employees and approved agents and representatives, to comply with
               all applicable laws, regulations and guidelines in connection
               with the Promotion of the Products in the International
               Territory. Abbott shall not make any claims or representations in
               respect of the Products which are inconsistent with

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               Legal Requirements and the core package and other regulatory
               materials shall be approved pursuant to Abbott's then current
               product approval procedures.

                  4.4 PRODUCT DEVELOPMENT COMMITTEE. The Parties shall also form
a Product Development Committee which shall be responsible for developing
worldwide strategies for Marketing Studies that build value for the Products and
shall act in an advisory capacity with respect to (i) the clinical development
and Product Approval of the Products in the Territories and (ii) potential
combination therapies using the Products, the products to be co-promoted by the
Parties under the Co-Promotion Agreement, and/or one or more other
pharmaceutical products. The Product Development Committee shall include an
equal number of representatives from Abbott and Triangle and shall be chaired by
a Triangle representative. It shall generally follow the rules established by
Section 4.2(a)(i) through (vi) for the U.S. Marketing Board, except that final
decisions with respect to Marketing Studies shall be made by Triangle with
respect to Marketing Studies proposed or requested by the U.S. Marketing Board
and by Abbott with respect to Marketing Studies proposed or requested by the
International Marketing Board, irrespective of the country or countries in which
such Marketing Studies are conducted.

                  4.5 NAMES. While the configuration and placement of the Abbott
name and the Triangle name shall be decided by the U.S. Marketing Board in the
U.S. Territory and by Abbott for the International Territory, it is agreed that
the Abbott name and the Triangle name shall appear and be equally prominent on
all Products, Sample Packs and U.S. Promotional Materials in the U.S. Territory.
The Product's N.D.C. number shall be in Triangle's name. The Products will
utilize an Abbott List Number in the U.S. Territory. To the extent permitted by
the local laws of the countries of the International Territory, Abbott shall
include the phrase "under license from Triangle Pharmaceuticals" on all
Products, Sample Packs and Promotional Materials in the International Territory.

                  4.6 INDIGENT PROGRAMS. In addition to the Promotion activities
covered under this Agreement, the U.S. Marketing Board in the U.S. Territory and
the International Marketing Board in the International Territory may establish
and operate an indigent program for distribution of Products and/or Sample Packs
to needy individuals and/or the physicians and other providers serving such
needy individuals and an expanded access program. *** ,
as the case may be.

                                   ARTICLE 5

                        MILESTONE PAYMENTS FOR PAST R & D

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                  5.1 R & D PAYMENTS. In consideration of past research and
development performed by Triangle, Abbott shall make the following milestone
payments to Triangle, which payments shall be due and payable upon the dates
specified in Subsections (a) and (b) and within *** after the achievement of
the events specified in Subsections (c) through (m):

                         (a) *** Dollars ($ *** ) on or before *** ;

                         (b) *** Dollars ($ *** ) on or before *** ;

                         (c) *** Dollars ($ *** upon *** (in addition to any
                    other payments payable pursuant to this Section 5.1);

                         (d) *** Dollars ($ *** ) upon *** (in addition to
                    any other payments payable pursuant to this Section 5.1);

                         (e) *** Dollars ($ *** ) upon *** ;

                         (f) *** Dollars ($ *** ) upon *** ;

                         (g) *** Dollars ($ *** ) upon the *** ;

                         (h) *** Dollars ($ *** ) upon the earlier to occur of
                    (i) the *** or (ii) *** ;

                         (i) *** Dollars ($ *** ) upon *** ;

                         (j) *** Dollars ($ *** ) upon *** ;

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                         (k) *** Dollars ($ *** ) upon the *** ;

                         (l) *** Dollars ($ *** ) upon the earlier to occur of
                    (i) the *** or (ii) ***;

                         (m) *** Dollars ($ *** ), at Triangle's election,
                    upon the occurrence of either: (i) *** or (ii)*** ;
                    provided that only *** will be payable under this
                    Subsection (m).

                  5.2 SINGLE PAYMENT OBLIGATION. Each of the foregoing
milestones shall only be paid once ***.

                  5.3 NOTICE. Triangle shall promptly notify Abbott of the
***. Abbott shall promptly notify Triangle of the ***.

                                   ARTICLE 6

                                 PROFIT SHARING

                  6.1 REPORTS BY ABBOTT. Within *** from
the end of each calendar quarter starting with the first calendar quarter for
which the Parties have budgeted expenditures under Article 4, or as otherwise
necessary, Abbott shall deliver to Triangle a true and accurate written report
showing whichever of the following are applicable for such calendar quarter:

                         (a) the Abbott Net Sales and Net Units of Product Sold
                    in: (i) the U.S. Territory; and (ii) the International
                    Territory (each in the aggregate and on a
                    Product-by-Product, country-by-country basis), a summary of
                    Abbott gross sales of and discounts from the Products in the
                    U.S. Territory, and any changes in the WAC for the U.S.
                    Territory;

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                         (b) the Abbott Distribution Margin  ***  for: (i)
                    the U.S. Territory; and (ii) the International Territory;

                         (c) the Abbott Operating Margin  ***  for: (i) the
                    U.S. Territory; and (ii) the International Territory;

                         (d) any updated information regarding Abbott Net Sales,
                    Abbott Distribution Margin and Abbott Operating Margin for
                    any prior calendar quarter(s);

                         (e) the exchange rates, if any, used in determining the
                    amount of Dollars calculated pursuant to Section 7.3;

                         (f) any such other information reasonably required by
                    Triangle to comply with its reporting obligations under the
                    Triangle License Agreements; and

                         (g) A report in electronic format showing the number of
                    Details performed by Abbott in the U.S. Territory, broken
                    down by Abbott product Detail codes and by Physicians
                    (including the physician name, address, AMA Education Number
                    and AMA specialty), during such calendar quarter and such
                    calendar year to date, the date of such presentation, and a
                    flag indicating whether such presentation was a Primary
                    Detail or a Secondary Detail.

The Divisional Vice President, Controller for the Pharmaceutical Products
Division of Abbott and the Divisional Vice President, Controller of the
International Division of Abbott shall jointly certify in writing the
correctness and completeness of each report submitted by Abbott pursuant to this
Section 6.1. In addition, Abbott's ***.

                  6.2 REPORTS BY TRIANGLE. Within *** from the end of each
calendar quarter starting with the first calendar quarter for which the
Parties have budgeted expenditures under Article 4, or as otherwise
necessary, provided that Abbott has timely delivered the report referenced in
Section 6.1, Triangle shall deliver to Abbott a true and accurate written
report showing whichever of the following are applicable for such calendar
quarter:

                         (a) the Triangle Product Sales in the U.S. Territory;

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                         (b) the Triangle Distribution Margin for the U.S.
                    Territory  *** ;

                         (c) the Triangle Operating Margin for the U.S.
                    Territory  *** ;

                         (d) the U.S. Product Profit;

                         (e) the International Product Profit and the Triangle
                    Third Party Royalties in the International Territory;

                         (f) the balance in the Reimbursement Account, any
                    accrued but unpaid interest thereon, and Triangle's Cash;

                         (g) the Abbott U.S. Profit Amount, the Triangle U.S.
                    Profit Amount, the Abbott International Profit Amount and
                    the Triangle International Profit Amount;

                         (h) the U.S. Adjustment Amounts for each Party and the
                    International Adjustment Amount;

                         (i) the Final Payment due to either Abbott or Triangle
                    pursuant to Section 6.6;

                         (j) any updated information regarding Triangle Product
                    Sales, Triangle Distribution Margin, Triangle Operating
                    Margin and Triangle Third Party Royalties for any prior
                    calendar quarter(s) and the U.S. Product Profit, the
                    International Product Profit, the Abbott U.S. Profit Amount,
                    the Triangle U.S. Profit Amount, the Abbott International
                    Profit Amount, the Triangle International Profit Amount, the
                    U.S. Adjustment Amount, the International Adjustment Amount
                    and the Final Payment for any prior calendar year(s); and

                         (k) a report in electronic format showing the number of
                    Details performed by Triangle in the U.S. Territory, broken
                    down by Triangle product Detail codes, and by Physician
                    (including the Physician name and address, AMA Educational
                    Number and AMA specialty) during such calendar quarter and
                    such calendar year to date, the date of such presentation
                    and a flag indicating whether such presentation was a
                    Primary Detail or a Secondary Detail.

The Chief Financial Officer and/or Treasurer of Triangle shall certify in
writing the correctness and completeness of each report submitted by Triangle
pursuant to this Section 6.2. In addition, Triangle's

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***.

                  6.3 NET LOSS. Net losses shall be allocated between the
Parties in accordance with the allocation provisions set forth in Sections 6.4
and 6.5. The Parties understand that the U.S. Product Profit, the International
Product Profit, the Abbott U.S. Profit Amount, the Triangle U.S. Profit Amount,
the Abbott International Profit Amount and the Triangle International Profit
Amount can each be a negative number and represent a net loss.

                  6.4 U.S. PROFIT SPLIT. The U.S. Product Profit for each
calendar year (or portion thereof for less than a full calendar year) shall be
shared between the Parties as follows:

                    (a) The following table represents the percentage split of
               U.S. Product Profit, the calculation of which is set forth in
               Section 6.4(b):

<TABLE>
<CAPTION>
           Annual Abbott Net Sales
           In the U.S. Territory             Percent of Product Profit
           -----------------------           -------------------------
                                             Abbott           Triangle
                                             ------           --------
             <S>                               <C>
             ***                                 ***
             ***                                 ***
</TABLE>


                    (b) The sharing of the U.S. Product Profit shall be
               determined on an aggregate basis for all Products as follows:

                         (i) If the Abbott Net Sales in the U.S. Territory
                    for the given calendar year (or portion thereof for less
                    than a full calendar year) is less than *** Dollars ($
                    *** ), the U.S. Product Profit shall be split *** to
                    Abbott and *** to Triangle; and

                         (ii) If the Abbott Net Sales in the U.S. Territory
                    for the given calendar year (or portion thereof for less
                    than a full calendar year) is equal to or greater than
                    *** Dollars ($ *** ), the U.S. Product Profit shall be
                    split *** to Abbott and *** to Triangle from the first
                    dollar of sales.

                    (c) The allocation of U.S. Product Profit (whether a
               positive (profit) amount or a negative (loss) amount) between
               Abbott and Triangle pursuant to Sections 6.4(a) and (b) as of the
               end of the applicable calendar quarter or year shall be called
               the "Abbott U.S. Profit Amount" and

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                                      -37-
<PAGE>

               the "Triangle U.S. Profit Amount," respectively, which together
               shall equal the U.S. Product Profit as of the end of such period.

                    (d) With respect to the U.S. Territory, for the first
               calendar quarter of each calendar year, the "U.S. Adjustment
               Amount" shall be determined for *** and shall be determined
               for Triangle by subtracting the *** . For the second, third
               and fourth calendar quarters of each calendar year, the U.S.
               Adjustment Amount shall be determined, with respect to such
               calendar quarter (i) for *** (A) the *** for *** quarter and
               (B) the Abbott U.S. Profit Amount as of the end of the
               immediately preceding *** (ii) for *** (A) the *** (B) the
               ***. If the U.S. Adjustment Amount is positive for Abbott and
               negative for Triangle, then Abbott shall owe such positive
               amount to Triangle. If the U.S. Adjustment Amount is negative
               for Abbott and positive for Triangle, then Triangle shall owe
               such positive amount to Abbott.

                    (e) In the event that the *** for any Product falls below
               the *** at any time during the applicable period or any prior
               calendar quarter or year, the Parties shall *** in the *** the
               *** was utilized to *** the Products in the United States,
               based on the Net Units of Product Sold in the U.S. Territory
               for such period(s).

                    (f) The payment of amounts identified in this Section 6.4
               shall be made in accordance with Section 6.6.

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                  6.5 INTERNATIONAL PROFIT SPLIT. The International Product
Profit for each calendar year (or portion thereof for less than a full calendar
year) shall be shared between the Parties as follows:

                    (a) The following table represents the percentage split of
               International Product Profit, the calculation of which is set
               forth in 6.5(b):

<TABLE>
<CAPTION>
         Annual Abbott Net Sales
         In the International Territory                              Percent of Product Profit
         ------------------------------               ----------------------------------------------------
                                                                     Abbott               Triangle
                                                      ------------------------    ------------------------
              <S>                                     <C>                         <C>
              ***                                      ***                          ***
              ***                                      ***                          ***
              ***                                      ***                          ***
</TABLE>


                    (b) The sharing of the International Product Profit shall be
               determined on an aggregate basis for all Products as follows:

                         (i) If the Abbott Net Sales in the International
                    Territory for the given calendar year (or portion thereof
                    for less than a full calendar year) is less than ***
                    Dollars ($ *** ), the International Product Profit shall
                    be split *** to Abbott and *** to Triangle;

                         (ii) If the Abbott Net Sales in the International
                    Territory for the given calendar year (or portion thereof
                    for less than a full calendar year) is equal to or
                    greater than *** Dollars ($ *** ) but is less than ***
                    Dollars ($ *** ), "X%" of the International Product
                    Profit shall be split *** to Abbott and *** to Triangle,
                    and "Y%" of the International Product Profit shall be
                    split *** to Abbott and *** to Triangle. "X%" shall be
                    determined by dividing *** Dollars ($ *** ) by the *** in
                    the International Territory for such calendar year (or
                    portion thereof for less than a full calendar year), and
                    "Y%" shall be calculated by *** *** ; and

                         (iii) If the Abbott Net Sales in the International
                    Territory for the given calendar year (or portion thereof
                    for less than a full calendar year) is equal to or greater
                    than *** Dollars ($ *** ), "X%" of the

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                                      -39-
<PAGE>

                    International Product Profit shall be split *** to Abbott
                    and *** to Triangle; "Y%" of the International Product
                    Profit shall be *** ; and "Z%" of the International
                    Product Profit shall be split *** to Abbott and *** to
                    Triangle. "X%" shall be determined by dividing ***
                    Dollars ($ *** ) by the *** for such calendar year (or
                    portion thereof for less than a full calendar year). "Y%"
                    shall be determined by dividing *** Dollars ($ *** ) by
                    the *** in the International Territory for such calendar
                    year (or portion thereof for less than a full calendar
                    year). "Z%" shall be determined by *** .

                    (c) The allocation of International Product Profit (whether
               a positive (profit) amount or a negative (loss) amount) between
               Abbott and Triangle pursuant to Sections 6.5(a) and (b) as of the
               end of the applicable calendar quarter or year shall be called
               the "Abbott International Profit Amount" and the "Triangle
               International Profit Amount," respectively, which together shall
               equal the International Product Profit as of the end of such
               period.

                    (d) With respect to the International Territory, for the
               first calendar quarter of each calendar year, the
               "International Adjustment Amount" shall be determined by
               subtracting the *** . For the second, third and fourth
               calendar quarters of each calendar year, the International
               Adjustment Amount shall be determined, with respect to such
               calendar quarter, by ***. If the International Adjustment
               Amount is positive, then Abbott shall owe such amount to
               Triangle. If the International Adjustment Amount is negative,
               then Triangle shall owe such amount to Abbott, subject to
               Section 6.6(b).

                    (e) The payment of amounts identified in this Section 6.5
               shall be made in accordance with Section 6.6.

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                  6.6 PAYMENTS.

                    (a) THIRD PARTY ROYALTIES FOR THE INTERNATIONAL TERRITORY.
               Abbott shall pay to Triangle the Third Party Royalties for the
               International Territory, in the manner provided in Section
               6.6(c).

                    (b) PAYMENT DEFERRAL. With respect to each calendar
               quarter, if the International Adjustment Amount is negative
               for such quarter (i.e. Triangle owes such amount to Abbott),
               Triangle shall be permitted to defer payment of such
               International Adjustment Amount to the extent, and only to the
               extent, that Triangle's cash, cash equivalents, short term and
               long term investments (at the end of the calendar quarter, as
               defined in the footnotes to Triangle's consolidated financial
               statements, hereinafter "Triangle's Cash") is or would be less
               than $ *** after such payment. Any amounts deferred pursuant
               to the immediately preceding sentence shall be added to a
               "Reimbursement Account" maintained for Triangle, which shall
               initially *** . The Reimbursement Account shall bear *** on
               the amount, if any, from time to time in the Reimbursement
               Account. With respect to each subsequent calendar quarter, if
               the International Adjustment Amount is positive for such
               quarter and there is a balance in the Reimbursement Account
               (plus any accrued but unpaid interest), Abbott shall be
               permitted to offset payment of such International Adjustment
               Amount (otherwise owing to Triangle) to the extent, and only
               to the extent, of the current balance in the Reimbursement
               Account. If Triangle's Cash exceeds $ *** when there is a
               balance in the Reimbursement Account (plus any accrued but
               unpaid interest), Triangle shall apply such excess to pay down
               the amount of such balance in connection with the applicable
               Final Payment. In addition, if Abbott is obligated to make any
               payment(s) to Triangle pursuant to Section 5 at any time when
               there is a balance in the Reimbursement Account, Abbott shall
               be permitted to offset a portion of such payment to the
               extent, and only to the extent, that Triangle's Cash would
               exceed $*** after such payment. The balance in the
               Reimbursement Account (including any accrued but unpaid
               interest) shall be correspondingly reduced by the amount of
               any Triangle payment or Abbott offset under this Section
               6.6(b). Triangle shall promptly provide to Abbott upon its
               reasonable request a written report indicating Triangle's Cash
               to permit Abbott to determine Triangle's obligations under
               this Section 6.6(b). Triangle may at its option elect to pay
               down the Reimbursement Account (including any accrued but
               unpaid interest) when Triangle's Cash is less than $ ***.

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                                      -41-
<PAGE>

                    (c) FINAL PAYMENT. After each calendar quarter, the U.S.
               Adjustment Amount (payable pursuant to Section 6.4), the
               International Adjustment Amount (payable pursuant to Section
               6.5, except to the extent deferred or offset pursuant to
               Section 6.6(b)), any Third Party Royalties due Triangle for
               the International Territory pursuant to Section 6.6(a), and
               any other payment by Triangle to Abbott pursuant to Section
               6.6(b) shall be netted, and the net amount (the "Final
               Payment") shall be paid by the owing Party to the other Party.
               If the Final Payment for each calendar quarter is due to
               Abbott from Triangle, it shall be paid upon the delivery of
               the Triangle report submitted pursuant to Section 6.2. If the
               Final Payment is due to Triangle from Abbott, it shall be paid
               within *** of Abbott's receipt of Triangle's report under
               Section 6.2.

                  6.7 YEAR-END RECONCILIATION. Within *** after the end of
each calendar year starting with the first calendar year for which the
Parties have budgeted expenditures under Article 4, or as otherwise
necessary, the Product Profit split between the Parties pursuant to Sections
6.4 and 6.5, as well as the Reimbursement Account, for such calendar year
shall be recalculated (the "Reconciliation Amount") to reflect any amended
information (such as amended sales data, product returns or chargebacks)
relevant to the calculation of the Reconciliation Amount for such calendar
year. Within *** after any such recalculation, Abbott shall pay to Triangle,
or Triangle shall pay to Abbott, as the case may be, an amount equal to the
difference between the most recent prior calculation of the Final Payment or
the Reconciliation Amount and the latest Reconciliation Amount.

                  6.8 PERFORMANCE ADJUSTMENTS.

                    (a) FAILURE TO ACHIEVE U.S. *** . If for any calendar
               year, either Party fails to achieve at least *** of such
               Party's *** for such calendar year in the U.S. Territory, such
               Party's share of the split of U.S. Product Profits pursuant to
               Sections 6.4(a) and (b) for such calendar year shall be ***
               for each *** from the *** . For example, if a Party fulfills
               only *** of its *** and it is entitled to *** of the U.S.
               Product Profits, such Party's share of the U.S. Product
               Profits for such calendar year shall be reduced to *** and the
               other Party's share of the U.S. Product Profit shall be *** .
               In no event shall the adjustment to U.S. Product Profits
               exceed *** . For example, if a Party would otherwise be
               entitled to a *** profit split, such Party's profit split
               could not fall below *** as a result of this Section 6.8(a).
               Notwithstanding the foregoing, neither Party shall

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                                      -42-
<PAGE>

               be deemed to have failed to achieve the required percentage of
               its *** if such failure resulted from an event of Force
               Majeure pursuant to Article 19. The calculations in this
               Section 6.8(a) of a Party's achievement of its *** shall be
               made on an aggregate basis across all Products and any
               reduction in the split of U.S. Product Profit shall apply to
               all Products for such calendar year.

                    (b) FAILURE TO ACHIEVE INTERNATIONAL PERFORMANCE
               COMMITMENT. If for any calendar year, Abbott fails to *** of
               the *** for such calendar year with respect to the
               International Territory, Abbott's share of the split of
               International Product Profits pursuant to Sections 6.5(a) and
               (b) shall be reduced by *** for each *** from the ***
               commitment level. For example, if Abbott has outlays equal to
               only *** of *** and it is entitled to *** of the International
               Product Profits, Abbott's share of the International Product
               Profits shall be reduced to *** and Triangle's share of the
               International Product Profit shall be increased to *** . In no
               event shall the adjustment to International Product Profits
               exceed *** . For example, if Abbott would otherwise be
               entitled to a *** , Abbott's profit split could not fall below
               *** as a result of this Section 6.8(b). Notwithstanding the
               foregoing, Abbott shall not be deemed to have failed to
               achieve the required percentage of its commitment if such
               failure resulted from an event of Force Majeure pursuant to
               Article 19.

                  6.9 EXAMPLES. Exhibit 6.9 sets forth various examples of the
calculations of the profit split required by this Article 6.

                                   ARTICLE 7

                             METHOD OF PAYMENTS

                  7.1 PAYMENT PROCEDURE. All payments due under this Agreement
shall be paid in Dollars by wire transfer or by such other means agreed upon by
the Parties, in each case at the expense of the payor, for value no later than
the due date thereof (with twenty four 24 hours advance notice of each wire
transfer) to the following bank accounts or such other bank accounts as the
payee shall designate in writing within a reasonable period of time prior to
such due date:

                  If to Abbott:

                  Account Name:             Abbott Laboratories

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                                      -43-
<PAGE>

                  Account Number:           ***
                  Bank:                     ***.
                                            ***
                  ABA Number:               ***


                  If to Triangle:

                  Account Name:             Triangle Pharmaceuticals, Inc.
                  Account Number:           ***
                  Bank:                     ***
                  Reference:                ***
                  ABA Number:               ***



                  7.2 INTEREST CHARGE. Without limiting either Party's rights
to pursue any other remedies at law or in equity, if any Party underpays or
otherwise fails to pay any payment required under this Agreement within ***
of the due date thereof, then, unless such discrepancy resulted from the
failure of the other Party to supply accurate or complete information, such
other Party shall pay annually *** until the date such payment is paid in
full.

                  7.3 FOREIGN CURRENCY EXCHANGE. All payments and reports
shall be made in Dollars. With respect to (i) sales of Products invoiced in a
currency other than Dollars; (ii) costs and expenses paid or incurred in a
currency other than Dollars; or (iii) any other instance when an item
required to be accounted for under this Agreement is expressed in a currency
other than Dollars, such amounts shall first be determined in the currency of
the country in which they are earned, paid or incurred and then converted
into Dollars using the *** ; provided, however, that in the event of rapidly
changing exchange rates, Abbott shall consult with Triangle and the Parties
shall agree on a mechanism to assure that exchange rates are calculated to
reflect fair market values on an ongoing basis. In the event that Abbott Net
Sales are accrued in a country where the local currency is blocked and cannot
be removed from the country, Abbott shall not be relieved from its obligation
to make payments hereunder or, subject to applicable Legal Requirements, the
timing of such payments.

                  7.4 REPORTING PERIOD. Whenever in this Agreement Abbott is
required to report or account for any financial matter on a calendar quarter or
calendar year basis, such reference shall be deemed to be a reference to a
Quarterly Reporting Period or Annual Reporting Period, unless Abbott switches
its financial

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                                      -44-
<PAGE>

reporting in the International Territory to a calendar year basis, in which case
all reporting and accounting shall be on a calendar quarter or calendar year
basis.

                  7.5 TAXES. Where any sum due to be paid to either Party
hereunder is subject to any withholding or similar tax, the Parties shall use
their best efforts to do all such acts and things and to sign all such documents
as will enable them to take advantage of any applicable double taxation
agreement or treaty. In the event there is no applicable double taxation
agreement or treaty, or if an applicable double taxation agreement or treaty
reduces but does not eliminate such withholding or similar tax, the payor shall
pay such withholding or similar tax to the appropriate government authority,
deduct the amount paid from the amount due the payee and secure and send to the
payor the best available evidence of such payment.

                  7.6 NO DOUBLE COUNTING OF COSTS. For the purpose of
determining any cost or expense which is shared by the Parties under this
Agreement or otherwise invoiced by one Party to another under this Agreement,
any cost or expense allocated by either Party to a particular cost category
shall be consistent with the terms of this Agreement and shall not also be
allocated to another category. In the event a cost or expense might arguably
fall into more than one category, the Parties shall mutually determine which
category such cost or expense most appropriately falls into.

                  7.7 SALES BY PERMITTED SUBLICENSEES. In the event Abbott
enters into an agreement with a Third Party to distribute or sell the Products
as an Abbott sublicensee in accordance with Section 2.4, such arrangements shall
***.

                  7.8 BOOKS AND RECORDS. Each Party shall keep full, true and
accurate books of account and records in accordance with generally accepted
United States accounting principles, consistently applied, containing all
particulars and reasonable supporting documentation as may be necessary for
the purpose of (i) determining the payments required by Article 6 and (ii)
such Party's compliance in other respects with its obligations under this
Agreement, including the number and types of Details performed by each party
in the U.S. Territory. All such books of account, records and supporting
documentation shall be open for inspection at a time mutually acceptable to
the Parties, during normal business hours no more frequently than *** by the
other Party and each Triangle Licensor, for *** following the end of each
calendar year to which they apply, by any independent certified public
accountant retained by the other Party (or by a Triangle Licensor)
(reasonably acceptable to the Party to be audited) on behalf of such other
Party (or by a Triangle Licensor) for the purpose of verifying the audited
Party's reports and/or compliance in other respects with obligations under
this Agreement. If such audit discloses an underpayment or overpayment, the
owing Party shall promptly pay to the other Party the amount of such

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                                      -45-
<PAGE>

underpayment or refund the amount of any overpayment, as the case may be,
plus interest charges calculated in accordance with Section 7.2. The costs
and expenses of performing such audits shall be borne by the auditing Party
and excluded from the auditing Party's SG&A; provided, however, that if the
amount of an underpayment by the audited Party is *** or more of the amount
actually due, then the reasonable out-of-pocket costs of such audit shall be
borne solely by the audited Party and excluded from such Party's SG&A.

                  7.9 INTERNATIONAL EXPENSES INCLUDABLE IN SG&A. Triangle
shall invoice Abbott for costs and expenses incurred by Triangle with respect
to the International Territory which, pursuant to the terms of this
Agreement, are includable in Abbott SG&A (other than Triangle Third Party
Royalties which shall be reimbursed pursuant to Section 6.6), and Abbott
shall pay to Triangle the amount invoiced within *** of the invoice date.

                                   ARTICLE 8

                         PRODUCT SUPPLY AND DISTRIBUTION

                  8.1 PRODUCT DISTRIBUTION. Except as and to the extent
provided in this Agreement, Abbott shall exclusively distribute the Products
in the Territories to Third Party customers, including all activities
ancillary thereto (including, without limitation, warehousing and shipping).
Abbott shall use efforts *** to distribute Products in the Territories.
Abbott shall keep Triangle fully apprised with respect to its distribution
activities and shall provide Triangle with the input regarding these
activities. Subject to the terms of this Agreement, *** .

                  8.2 PRODUCT SUPPLY. In the U.S. Territory, Abbott shall
exclusively purchase from Triangle or from its designated Third Party
manufacturers, and Triangle or its designated Third Party manufacturers shall
exclusively supply to Abbott, Abbott's requirements for the Products in the
U.S. Territory. Product supply with respect to the International Territory
shall be dictated as provided in the Supply Agreement. To the extent that any
Product is sourced from Triangle or its designated Third Party manufacturers,
the sales forecast procedures set forth in this Sections 8.2 and 8.3 shall
apply thereto, except as otherwise provided in the Supply Agreement. The
Parties will cooperate to determine manufacturing strategy and objectives for
the supply of Compounds and Products, consistent with the terms of this
Agreement and any Third Party manufacture and supply chain agreements.

                    (a) SALES FORECAST. Within *** prior to the Launch of any
               Product in the U.S. Territory (except for *** such period
               shall be *** ), the U.S. Marketing

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<PAGE>

               Board shall establish a Sales Forecast for such Product
               specifying anticipated requirements of each Product in the
               U.S. Territory for the *** period commencing approximately ***
               prior to the anticipated date of Launch (the "Sales
               Forecast"). The U.S. Marketing Board shall be responsible for
               establishing, preparing and updating the Sales Forecast for
               the U.S. Territory.

                    (b) ROLLING FORECASTS. Such Sales Forecasts for the U.S.
               Territory shall be updated *** so that at the beginning of
               each *** , Triangle shall have been provided with a rolling
               Sales Forecast for the *** period commencing with the ***
               quarter after the date on which such Sales Forecast is
               submitted (i.e. approximately *** ). By way of example only,
               at the end of the *** (assuming a Product has been Launched),
               the U.S. Marketing Board shall provide Triangle with a Sales
               Forecast of the anticipated requirements of Product for the
               *** consisting of the *** .

                    (c) COMMERCIAL SCALE-UP AND DEVELOPMENT. Except as and to
               the extent otherwise specified in this Agreement, Triangle
               shall exercise its Reasonable Best Efforts to pursue the
               process development of the Products. The Parties will
               cooperate to determine process development strategy and
               objectives for the production of Products, consistent with the
               terms of this Agreement and any Third Party manufacture and
               supply agreements; provided that Triangle shall have control
               of all final decisions regarding process development. *** ,
               provided that the costs and expenses of producing validation
               batches of the Products shall be included in *** , as
               applicable, to the extent that the Product from such
               validation batches are ultimately Sold.

                    (d) TRIANGLE THIRD PARTY MANUFACTURERS. In the event that
               *** .

                  8.3 PRODUCT ORDERING AND DELIVERY. Abbott shall purchase the
Products and Triangle will deliver the Products in accordance with the following
procedures:

                    (a) Abbott shall purchase Products at the applicable
               Transfer Price by means of purchase orders submitted to Triangle
               at least *** in advance of the requested

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<PAGE>

               delivery date. Each purchase order shall be governed by the terms
               of this Agreement and none of the terms or conditions of Abbott's
               purchase orders, Triangle's acknowledgment forms or any other
               forms exchanged by the parties shall be applicable, except those,
               to the extent consistent with the terms set forth herein,
               specifying quantity ordered, delivery locations and delivery
               schedule and invoice information;

                    (b) All purchase orders for delivery during a calendar
               month that do not exceed *** of the latest Sales Forecast
               covering such month (excluding any amendments subsequent to
               the original date of such Sales Forecast) shall be *** .
               Triangle shall use its Reasonable Best Efforts to supply
               Abbott with any Product in *** of such Sales Forecast. All
               other purchase orders must be accepted or rejected by
               Triangle, in writing, by facsimile or air courier, within ***
               after receipt from Abbott. If Triangle does not provide such
               notice of acceptance or rejection within *** , it shall be
               deemed to have accepted such purchase orders in full.

                    (c) All Products shall be delivered *** as identified by
               Triangle;

                    (d) Abbott shall arrange and pay for shipping from the
               ***  point to Abbott's distribution centers  *** , and the
               risk of loss shall pass from Triangle to Abbott when the
               Products are delivered to the carrier at the *** ; and

                    (e) Triangle shall invoice Abbott at the Transfer Prices for
               all Products delivered, and Abbott shall pay to Triangle the
               amount invoiced within *** of the invoice date.

                  8.4 PRICING

                    (a) U.S. TERRITORY. *** shall establish the *** (" *** ")
               for each Product sold by Abbott to wholesalers and other Third
               Party customers, provided that in *** .

                    (b) TRANSFER PRICING IN THE U.S. TERRITORY. With respect
               to products to be sold for use in the U.S. Territory, *** (the
               " *** "). The ***; provided that (i) ***

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<PAGE>

               and (ii) *** shall be promptly ***. If the Parties *** of
               such *** . The *** shall be the *** ; provided, that such ***
               not affect the right of *** pursuant to the notice and other
               provisions set forth ***. Triangle shall deliver a letter to
               *** for the Products to establish ***.

                    (c) INTERNATIONAL TERRITORY. *** shall *** for each
               Product sold by *** to wholesalers and other Third Party
               customers for use in the International Territory; provided,
               however, that *** , as applicable, shall *** in a given
               country consistent with the practices and methodologies it
               uses in *** for *** in the same *** in such country having ***.

                  8.5 INVENTORIES.

                    (a) Subject to the receipt of Product from Triangle in
               accordance with this Article 8, Abbott shall use its Reasonable
               Best Efforts to maintain adequate inventories of the Products in
               the Territories to meet the needs of its customers on a timely
               basis based upon, among other factors, the Sales Forecast,
               previous demand histories and seasonal trends, and any customers'
               contractual commitments.

                    (b) In the event of Product shortages, available supplies
               shall be allocated first to permit any ongoing pre-clinical or
               clinical trials or other product development activities to
               continue on schedule. Supplies remaining available after that
               initial allocation shall be allocated on a country-by-country
               basis, pro rata based upon historical demand or some other
               mechanism to be mutually agreed upon by the Parties.

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                  8.7 CUSTOMER RELATIONS. With respect to customer complaints
relating to the Promotion or distribution of the Products, each Party shall act
promptly to remedy such complaints. All Product-related inquiries and Product
complaints shall be addressed as provided in Section 10.3. Without limiting the
generality of the foregoing, in the U.S. Territory, each Party shall be
responsible for responding to all customer complaints relating to such Party's
Co-Promotion and distribution of the Products under this Agreement and, in the
International Territory, Abbott shall respond to all such customer complaints,
with Triangle providing reasonable assistance requested by Abbott. Each Party
shall keep the other Party fully and promptly apprised of its receipt of any
such significant complaints in the Territories.

                  8.8 QUALITY CONTROLS. Both Parties shall institute quality
controls in accordance with generally accepted industry standards for the
storage, shipment, handling and distribution of the Products and shall define
responsibilities for key quality systems and a quality manual agreed to by both
Parties (including without limitation, Sample Packs) and shall comply with all
Legal Requirements relating to the storage, shipment, handling and distribution
of the Products. Triangle and Abbott shall institute quality controls in
accordance with generally accepted industry standards for the manufacture of
Products. Each Party shall have the right to audit all facilities used by the
other Party to fulfill their obligations under this Agreement (including any
Third Party manufacturing facilities, in accordance with the terms of the
underlying manufacturing agreement).

                  8.9 U.S. PRODUCT CHARACTERISTICS.

                    (a) Abbott shall not be obligated to accept from Triangle
               any Product with less than the greater of (i) *** of approved
               shelf life for such Product in the United States or (ii) ***
               of remaining shelf life; provided, however, that a Product may
               be shipped with a shorter shelf life of not less than *** if
               that is the limit approved by the FDA upon Launch.

                    (b) Triangle shall provide Abbott with a certificate of
               analysis with respect to each shipment of the Products to Abbott.
               Full batch documentation, including batch production records, and
               manufacturing and analytical records shall be available for
               review by Abbott on site at the manufacturing facility used by
               Triangle, during regular business hours and upon reasonable
               advance written notice from Abbott.

                    (c) Abbott shall notify Triangle in writing of any
               shortage in the quantity of any shipment of Product no later
               than *** following receipt of the Product. In the event of any
               such shortage, Triangle shall make up the shortage if
               replacement stock is available

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                                      -50-
<PAGE>

               in the next shipment of Product, but in any case no later than
               twenty (20) days or, if no such replacement stock is available,
               as soon as reasonably practical after receiving such notice, at
               no additional cost to Abbott.

                    (d) Abbott recognizes that, except for that portion of the
               Product supply manufactured by Abbott or its permitted
               sublicensees, all Product supply will be manufactured by Third
               Parties under agreement with Triangle, and that, while Triangle
               will use its Reasonable Best Efforts, there can be no assurance
               that the Product supplied by such Third Parties will be
               sufficient to meet demand.

                    (e) With respect to all Triangle Third Party
               manufacturers of finished Product, Triangle shall *** *** .
               With respect to Product manufactured by Abbott or its
               permitted sublicensees, Abbott shall ***.

                    (f) Abbott shall be entitled to *** for any Product that
               Abbott returns or rejects because such Product does not
               conform to the Product specifications or the Product
               characteristics referenced in this Section 8.9.

                                   ARTICLE 9
                           LICENSE AND PATENT MATTERS

                  9.1 *** . In the event that, as a result of *** in any of
the *** , becomes or is, as of the Effective Date, *** , with respect to ***
(including *** or other *** ) or any *** with respect to *** in addition to
*** shall be entitled to include such *** as a *** against the *** from time
to time in its sole discretion; provided, however, that *** shall only be
permitted to include as *** in any period that amount of *** which would
result in *** ( *** as a *** as defined in the *** ) *** as follows:

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                                      -51-
<PAGE>

<TABLE>
<CAPTION>
                                                      ***
                                                      ***
                    ***                              PER ANNUAL REPORTING PERIOD
                                                     ---------------------------
                    <S>                              <C>
                    ***                                    ***
                    ***                                    ***
                    ***                                    ***
</TABLE>

By way of example only, if the current *** subsequently *** , then *** , at
its discretion, would be able to include up to *** , resulting in ***. The
balance of any *** not includable in *** a given Annual Reporting Year may be
carried forward to subsequent Annual Reporting Years, subject to the
applicable limitation for such periods. Again, by way of example only, if ***
would be able, at its discretion, to *** ), but would be able to carry
forward any excess/unamortized amounts into subsequent periods, subject to
the applicable limitation for such periods. *** shall be permitted to include
within the above-referenced *** pursuant to this Section 9.1, (i) *** in ***
collectively for *** from time to time between the *** sole discretion
(including *** ) and (ii) with respect to *** as defined in section *** .
Nothing in this Agreement shall be deemed to be ***.

                  9.2 CONSENTS. Triangle shall use its Reasonable Best
Efforts to obtain the consent or approval from each of the Triangle Licensors
( *** ) to enter into and perform this Agreement and the Triangle-Abbott
Alliance Agreements. Such consent or approval shall be in substantially the
form attached hereto as Exhibit 9.2.

                  9.3 TRIANGLE COVENANTS. Triangle covenants that during the
Term, it will:

                    (a) fulfill all of its obligations under each of the
               Triangle License Agreements, including, but not limited to, any
               royalty, milestone or other monetary obligations set forth

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                                      -52-
<PAGE>

               therein, except for any obligations which Abbott or its
               Affiliates assumes hereunder as a Triangle sublicensee;

                    (b) take no action or omit to take any action which would
               cause it to be in breach of any provision of any of the Triangle
               License Agreements which would or could otherwise trigger
               termination of any such Agreements (e.g., bankruptcy, change of
               control in whole or with respect to any part of the Territories)
               or which would or could cause the conversion of any Triangle
               License Agreement from an exclusive to nonexclusive agreement, in
               whole or with respect to any part of the Territories;

                    (c) notify Abbott in the event that, and within ***
               after, Triangle receives notice from any Triangle Licensor
               that Triangle is in default under any Triangle License
               Agreement or that any Triangle Licensor has terminated or
               intends to terminate any Triangle License Agreement in whole
               or with respect to any part of the Territories or convert any
               Triangle License Agreement from an exclusive to non-exclusive
               agreement in whole or with respect to any part of the
               Territories. In the event of any default of the type described
               in this Section 9.3(c), Triangle agrees that if it fails or
               does not intend to cure such default, Abbott may, at Abbott's
               option and to the extent permitted under the applicable
               license agreement, do so and *** ; provided, however, that if
               any portion of such expenses would have otherwise been
               included as part of Third Party Royalties, Abbott and Triangle
               shall account for such portion of expense as a Triangle Third
               Party Royalty; and provided, further, that if such default
               relates to any activity which, as between the Parties, Abbott
               is obligated to perform independently with Triangle under this
               Agreement, Abbott's cost of curing such default shall *** but
               shall be accounted for as otherwise permitted by this
               Agreement;

                    (d) notify Abbott in the event that, and within ***
               after, Triangle receives any notice required under Section
               3.13(iii) of the FTC License Agreement. In the event of any
               default of the type described in Section 3.13(iii) of the FTC
               License Agreement, Triangle agrees that if it and the Triangle
               Licensor under the FTC License Agreement fail or do not intend
               to cure such default, Abbott may, at Abbott's option and to
               the extent permitted under the applicable license
               agreement(s), do so and *** in curing such

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                                      -53-
<PAGE>

               default; provided, however, that if any portion of such
               expenses would have otherwise been part of Third Party
               Royalties or act as a credit against Third Party Royalties,
               Abbott and Triangle shall account for such portion of that
               expense as part of Third Party Royalties; and provided,
               further, that if such default relates to any activity which,
               as between the Parties, Abbott is obligated to perform
               independently with Triangle under this Agreement, Abbott's
               cost of curing such default shall *** but shall be accounted
               for as otherwise permitted by this Agreement;

                    (e) notify Abbott in the event that, and within ***
               after, Triangle receives any notice from a Triangle Licensor
               required under Section 2.6 of the FTC License Agreement or
               Section 2.6 of the DAPD License Agreement. Triangle shall
               consult with Abbott prior to making its decision regarding the
               acquisition of any sublicense pursuant to such sections.

                    (f) provide Abbott with a copy of any reports,
               correspondence or notice within *** from the submission to or
               receipt from any Triangle Licensor under or relating to any
               Triangle License Agreement, Compound or Product;

                    (g) notify Abbott if and when ( *** ) it decides to
               abandon or allow to lapse any patent application or patent or
               not to initiate or take any other patent prosecution activity
               that it has under the Triangle License Agreements or with
               respect to any Product Patent. In such event, Triangle agrees
               that Abbott may assume any such patent prosecution activity in
               connection therewith, and Triangle shall reasonably cooperate
               with Abbott in connection with any such patent prosecution
               activity and, if requested by Abbott, shall reasonably seek
               the cooperation of the applicable Triangle Licensor; and

                    (h) take no action or omit to take any action which would
               result in derogation of the Product Patents in any existing or
               future litigation or interference with any Third Parties or
               future oppositions to foreign patents of any Third Parties.

                  9.4 ABBOTT COVENANTS.

                    (a) Abbott covenants and agrees that during the Term, on its
               behalf and on behalf of each of its permitted sublicensees, to:

                         (i) take no action or omit to take any action which
                    would result in derogation of the Product Patents in any
                    existing or future litigation or interference with any Third
                    Parties or future oppositions to foreign patents of any
                    Third Parties;

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                                      -54-
<PAGE>

                         (ii) abide by all of the applicable terms and
                    conditions of the Triangle License Agreements which apply to
                    it in its capacity as a sublicensee pursuant to Section 2.3
                    of this Agreement; and

                         (iii) process all communications with any Triangle
                    Licensor through a Triangle representative to be identified
                    by Triangle after the Effective Date, except for those
                    communications specifically contemplated herein.

                    (b) Abbott hereby covenants and agrees to the extent that
               there is a conflict between the Triangle-Abbott Alliance
               Agreements and the applicable Triangle License Agreement, the
               terms and provisions of the Triangle License Agreement shall
               control.

                    (c) To the extent that Abbott incurs out-of-pocket costs in
               connection with its obligation(s) to abide by the applicable
               terms of the Triangle License Agreements, which costs are not
               otherwise included in Abbott SG&A and which do not result from
               Abbott's performance of its other obligations or exercise of its
               rights identified elsewhere in this Agreement or reasonably
               ancillary thereto, such costs shall be included in Abbott SG&A in
               the appropriate territory; provided, that if either Party
               determines or believes that such a cost may be incurred, such
               Party shall provide reasonable advance notice, to the extent
               possible, to the other and the Parties shall meet at a mutually
               agreed time and place to discuss the obligations leading to such
               costs.

                  9.5 THIRD PARTY INFRINGEMENT. If Abbott or Triangle become
aware of any activity that such Party believes infringes a Valid Claim of a
Product Patent, such Party shall promptly notify the other Party of all
relevant facts and circumstances pertaining to the potential infringement.
The Primary Enforcement Party shall have the right to enforce any rights
within the Product Patents against such infringement, *** ; provided,
however, with respect to *** alternative provisions apply, as specified in
the applicable Triangle License Agreement or the GW License Agreement (as
defined in the first amendment to the FTC License Agreement), as applicable,
and the Parties recognize that only if such Triangle Licensor fails or
declines to enforce such patent rights shall the Parties, to the extent
permitted by the terms of the applicable Triangle License Agreement, have
enforcement rights provided by this Section 9.5 and Section 9.6. The other
Party, at its own expense, shall cooperate with the Primary Enforcement Party
in such effort, including being joined as a party to such action if
necessary, and Triangle shall reasonably seek the cooperation of the
applicable Triangle Licensor. Any damage award or settlement in excess of the
cost and expense of prosecuting such infringement action *** of any such
award and settlement shall be added to the U.S.

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                                      -55-
<PAGE>

Product Profit and/or the International Product Profit, as the case may be, and
*** the Parties as set forth in this Agreement.

                  9.6 SECONDARY ENFORCEMENT PARTY'S RIGHT TO PURSUE THIRD
PARTY INFRINGERS. If the Primary Enforcement Party shall fail, within the
lesser of (i) *** of the notice of infringement required by Section 9.5 or
(ii) *** under the applicable Triangle License Agreement, to either (A)
terminate such infringement or (B) institute an action seeking to prevent
continuation thereof, and thereafter to diligently prosecute such action, or
if the Primary Enforcement Party sooner notifies the other Party that it does
not plan to terminate the infringement or institute such action, then the
Secondary Enforcement Party shall have the right to do so *** . The other
Party, *** , shall cooperate in such effort, including being joined as a
party to such action, and Triangle shall reasonably seek the cooperation of
the applicable Triangle Licensor. Any damage award or settlement in excess of
the cost and expense of prosecuting such infringement action shall *** of any
such award and settlement shall be added to the U.S. Product Profit and/or
the International Product Profit, as the case may be, and *** the Parties as
set forth in this Agreement.

                  9.7 TRIANGLE'S LICENSOR'S RIGHT TO PURSUE THIRD PARTY
INFRINGEMENT. If both Triangle and Abbott shall fail within *** of the notice
of infringement required by Section 9.5 or such shorter period of time
prescribed by the applicable Triangle License Agreement, to either (i)
terminate such infringement or (ii) institute an action to prevent
continuation thereof, and diligently prosecute such action, or if Triangle
sooner notifies such Triangle Licensor that Triangle and Abbott do not plan
to terminate the infringement or institute such action, then the Parties
recognize that the Triangle Licensor of such Product or Compound will have
the right to do so under the Triangle License Agreement. The Parties, at
their respective expense, shall cooperate with the Triangle Licensor in such
effort, including being joined as a party to such action. The portion, if
any, of a damage award or settlement which is shared by the Triangle Licensor
with Triangle shall be added to U.S. Product Profit and/or the International
Product Profit, as the case may be, and *** the Parties as set forth in this
Agreement.

                  9.8 INTERNATIONAL PATENT ENFORCEMENT COSTS AND EXPENSES ***
 . Abbott shall reimburse Triangle for patent enforcement costs and expenses
incurred with respect to the International Territory by Triangle pursuant to
Sections 9.5 and 9.6 which, pursuant to the terms of this Agreement, are ***
and subject to reimbursement as provided in Section 7.9.

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<PAGE>

                                   ARTICLE 10
              ADVERSE EVENTS, RECALLS AND OTHER REGULATORY MATTERS

       10.1 ADVERSE REACTION REPORTING. Each Party shall keep the other Party
informed of information in or coming into its possession or control
concerning side effects, injury, toxicity or sensitivity reaction and
incidents of severity thereof associated with commercial and clinical uses,
studies, investigations or tests of each Product in the Territories, whether
or not determined to be attributable to the Product. Triangle shall be
responsible for filing with the FDA, as required, any adverse reaction
reports that it receives. Abbott shall be responsible for filing with the
appropriate regulatory authorities in the International Territory ***, as
required, adverse reaction reports that it receives. The responsibilities of
the Parties with respect to (i) notification of adverse events from the
receiving Party to the other Party and (ii) the reporting of adverse drug
experiences to the regulatory authorities shall all be performed in
accordance with a procedure to be mutually agreed by the Parties after the
Effective Date, giving due consideration to the applicable regulatory
requirements in the Territories.

       10.2 SAFETY ISSUES. In order to ensure that both Parties are provided
with an adequate opportunity to review safety matters, the Parties shall
mutually agree after the Effective Date on procedures with respect to (i)
regulatory reporting requirements, (ii) the review of Product labeling, (iii)
maintenance of a safety database and (iv) other safety issues.

       10.3   PRODUCT COMPLAINTS AND INQUIRIES.

              (a) Any medical or technical Product-related inquiries from
       consumers, physicians or other Third Party customers who reside in the
       (i) U.S. Territory shall be handled by Triangle and (ii) International
       Territory shall be handled by Abbott. Triangle shall supply Abbott with
       copies of its standard response information for the Products as well as
       any updates thereto. Abbott shall use such information to respond to any
       such inquiries from the International Territory. Information concerning
       any such inquiries in the U.S. Territory received by Abbott's
       Pharmacovigilance Department shall be forwarded to Triangle's Regulatory
       Affairs Department within one business day of Abbott's receipt of the
       request. Information concerning any such inquiries in the International
       Territory received by Triangle shall be forwarded to Abbott's
       Pharmacovigilance Department within one business day of Triangle's
       receipt of the request. Each Party shall prepare and maintain a database
       containing responses to such inquiries from consumers, physicians or

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                                      -57-

<PAGE>

       other Third Party customers who reside in the territory for which it is
       responsible, and shall make the contents available to the other Party
       promptly from time to time upon request.

              (b) Each Party shall maintain a record of all complaints or
       reports of an actual or potential failure of any Product to meet the
       standards set forth in regulatory filings or in agreements among the
       Parties. Such failure may involve the finished Product or one of its
       intermediate stages. The responsibilities of the Parties with respect to
       (a) notification of the Product Complaint from the receiving Party to the
       other Party and (b) the handling of Product Complaints shall all be
       performed in accordance with a procedure to be mutually agreed by the
       Parties after the Effective Date.

       10.4 PRODUCT RECALL. In the event that either Party determines that an
event, incident or circumstance has occurred which may result in the need for
a recall or other removal of any Product, or any lot or lots thereof, from
the market, such Party shall advise the other and the Parties shall consult
with respect thereto. Triangle shall have the sole authority to decide
whether to commence, and the sole responsibility for the handling and
disposition of, a recall or other removal of such Product in the U.S.
Territory, and Abbott shall have the sole authority to decide whether to
commence, and the sole responsibility for the handling and disposition of, a
recall or other removal of such Product in the International Territory. Any
such recall or other removal, by either Party, shall occur pursuant to a
procedure to be mutually agreed by the Parties after the Effective Date.
Except as provided below, if a Product (or any lot or lots thereof) is
recalled or otherwise removed from the market, the costs and expenses of such
recall or removal, including, without limitation, expenses and other costs or
obligations to Third Parties, the cost and expense of notifying customers and
the costs and expenses associated with shipment of the recalled Product and
the cost and expense of destroying the Product removed from the market, if
necessary, except as provided below shall be (i) *** and (ii) ***. In the
event that such recall or removal costs, expenses or obligations result from
one Party's: (i) improper or negligent manufacturing, distribution, storage
or shipment of the Product; (ii) improper sampling practices or mishandling
of Sample Packs; (iii) Co-Promotion or Promotion of the Product in a manner
inconsistent with the Product's labeling; or (iv) violation of this
Agreement, such costs, expenses and obligations ***. In the event of a
recall, each Party shall promptly meet and discuss in good faith whether the
Parties' Detailing obligations should be reduced or redirected to another
Product.

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<PAGE>

       10.5 PROCEDURES. Within *** after the Effective Date, representatives
of each Party shall meet to establish procedures to accomplish the
obligations set forth in Sections 10.1, 10.2, 10.3, 10.4 and 10.6.

       10.6 GOVERNMENTAL CONTACT REPORTING. Each Party shall promptly notify the
other Party upon being contacted by the FDA or any other federal, state or local
governmental agency in the Territories for any material regulatory purpose
pertaining to this Agreement or to the Products. Neither Party shall respond to
the FDA or such governmental agency before consulting with the other Party,
unless under the circumstances pursuant to which FDA or such other federal,
state, local, national or supranational governmental agency contacts such Party,
it is not practical or lawful for the contacted Party to give the other Party
advance notice, in which event the contacted Party shall inform the other Party
of such contact as soon as practical and lawful. In addition, each Party shall
keep the other Party advised with respect to information concerning the safety
or efficacy of the Products. On the other Party's written request with respect
to any Product, each Party shall supply detailed information regarding such
safety, efficacy and medical information issues, including, if requested, copies
of safety reports filed with the FDA or any other governmental agency.

                                   ARTICLE 11
                         REPRESENTATIONS AND WARRANTIES

       11.1 ABBOTT REPRESENTATIONS AND WARRANTIES. Abbott hereby represents and
warrants to Triangle as follows:

              (a) Abbott is a corporation duly organized and validly existing in
       good standing under the laws of its state of incorporation, with all
       requisite corporate power and authority to own, lease and operate its
       properties and assets and to carry on its business as presently conducted
       and as proposed to be conducted;

              (b) Abbott has all requisite corporate right, power and authority
       to enter into this Agreement and the other Triangle-Abbott Alliance
       Agreements and to consummate the transactions contemplated hereby and
       thereby. The execution and delivery of this Agreement and the other
       Triangle-Abbott Alliance Agreements by Abbott and the consummation by
       Abbott of the transactions contemplated hereby and thereby have been duly
       authorized by all necessary corporate action on Abbott's behalf. This
       Agreement and the other Triangle-Abbott Alliance Agreements constitute
       legal, valid and binding obligations of Abbott, enforceable against
       Abbott in accordance with the terms hereof and thereof;

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<PAGE>

              (c) subject to compliance with the HSR Act and such filings as may
       be required pursuant to federal and state securities laws, the execution,
       delivery and performance by Abbott of this Agreement and each of the
       other Triangle-Abbott Alliance Agreements and Abbott's compliance with
       the terms and provisions hereof and thereof will not, result in any
       violation of, or default under (with or without notice or lapse of time,
       or both), or give rise to a right of termination, cancellation or
       acceleration of any obligation pursuant to, or a loss of benefits under,
       any provision of Abbott's Articles of Incorporation or By-laws, or any
       mortgage, indenture, lease or other agreement or instrument, license,
       judgment, order, decree, statute, law, ordinance, rule or regulation
       applicable to Abbott, its properties or assets; and

              (d) no consent, approval or authorization of, or designation,
       declaration or filing with any governmental authority is required in
       connection with the valid execution, delivery or performance of this
       Agreement and the other Triangle-Abbott Alliance Agreements by Abbott or
       the consummation by Abbott of the transactions contemplated hereby or
       thereby, except the filing of such forms with the United States
       Department of Justice and the Federal Trade Commission as shall be
       required by the HSR Act and the expiration or termination of any waiting
       periods thereunder and such filings, as may be required to be made with
       the SEC, any national securities exchange and any state securities
       commission. Upon their execution and delivery, and assuming the valid
       execution thereof by Triangle, this Agreement and the other
       Triangle-Abbott Alliance Agreements will constitute valid and binding
       obligations of Abbott, enforceable in accordance with their respective
       terms, except as enforceability may be limited by applicable bankruptcy,
       insolvency, reorganization, moratorium or similar laws affecting
       creditors' and contracting parties' rights generally and except as
       enforceability may be subject to general principles of equity (regardless
       of whether such enforceability is considered in a proceeding in equity or
       at law) and except to the extent that the indemnification agreements of
       in Section 15 hereof may be legally unenforceable.

       11.2 TRIANGLE REPRESENTATIONS AND WARRANTIES. Triangle hereby represents
and warrants to Abbott as follows:

              (a) Triangle is a corporation duly organized and validly existing
       in good standing under the laws of its state of incorporation, with all
       requisite corporate power and authority to own, lease and operate its
       properties and assets and to carry on its business as presently conducted
       and as proposed to be conducted;

                                      -60-

<PAGE>

              (b) Triangle has all requisite corporate right, power and
       authority to enter into this Agreement and the other Triangle-Abbott
       Alliance Agreements and to consummate the transactions contemplated
       hereby and thereby. The execution and delivery of this Agreement and the
       other Triangle-Abbott Alliance Agreements by Triangle and the
       consummation by Triangle of the transactions contemplated hereby and
       thereby have been duly authorized by all necessary corporate action on
       Triangle's behalf. This Agreement and the other Triangle-Abbott Alliance
       Agreements constitute legal, valid and binding obligations of Triangle,
       enforceable against Triangle in accordance with the terms hereof and
       thereof;

              (c) subject to compliance with the HSR Act and such filings as may
       be required pursuant to federal and state securities laws and except for
       the consents from the Triangle Licensors required by Section 9.2, the
       execution, delivery and performance by Triangle of this Agreement and
       each of the other Triangle-Abbott Alliance Agreements and Triangle's
       compliance with the terms and provisions hereof and thereof will not,
       result in any violation of, or default under (with or without notice or
       lapse of time, or both), or give rise to a right of termination,
       cancellation or acceleration of any obligation pursuant to, or a loss of
       benefits under, any provision of its Certificate of Incorporation or
       By-laws, or any mortgage, indenture, lease or other agreement or
       instrument, license, judgment, order, decree, statute, law, ordinance,
       rule or regulation applicable to Triangle or Triangle's properties or
       assets;

              (d) no consent, approval or authorization of, or designation,
       declaration or filing with any governmental authority is required in
       connection with the valid execution, delivery or performance of this
       Agreement and the other Triangle-Abbott Alliance Agreements by Triangle
       or the consummation by Triangle of the transactions contemplated hereby
       or thereby, except the filing of such forms with the United States
       Department of Justice and the Federal Trade Commission as shall be
       required by the HSR Act and the expiration or termination of any waiting
       periods thereunder and such filings, as may be required to be made with
       the SEC, the NASD, any national securities exchange and any state
       securities commission. Upon their execution and delivery, and assuming
       the valid execution thereof by Triangle, this Agreement and the other
       Triangle-Abbott Alliance Agreements will constitute valid and binding
       obligations of Triangle, enforceable in accordance with their respective
       terms, except as enforceability may be limited by applicable bankruptcy,
       insolvency, reorganization, moratorium or similar laws affecting
       creditors' and contracting parties' rights generally and except as
       enforceability may be subject to general principles of equity (regardless
       of whether such enforceability is considered in a proceeding in

                                      -61-

<PAGE>

       equity or at law) and except to the extent that the indemnification
       agreements of in Section 15 hereof may be legally unenforceable;

              (e) Except as specifically disclosed in Exhibit 11.2(e), in
       Triangle's Annual Report on Form 10-K for the year ending December 31,
       1998 or in Triangle's Quarterly Report on Form 10-Q for the period ending
       March 31, 1999:

                     (i) to its knowledge and information, there are no patents,
              trademarks or other proprietary rights which are valid and which
              would be infringed by making, having made, using, selling,
              offering for sale or importing Products in the Territories in
              accordance with the terms of this Agreement;

                     (ii) Triangle is not aware of sales of any products
              containing one or more Compounds that would constitute an
              infringement by a Third Party of the Product Patents; and

                     (iii) Triangle is aware of no pending interference or
              opposition proceeding or litigation or any communication which
              threatens an interference or opposition proceeding or litigation
              before any patent and trademark office, court, or any other
              governmental entity or court in any jurisdiction in regard to the
              Product Patents;

              (f) The execution, delivery and performance of this Agreement and
       the other Triangle-Abbott Alliance Agreements is not required to be
       submitted for a vote or other approval of the stockholders of Triangle
       under Section 271 of the Delaware General Corporation Law. The issuance
       and sale by Triangle of the Minimum Shares (as defined in the Stock
       Purchase Agreement) does not require approval of the stockholders of
       Triangle under any applicable federal or state laws or regulations or
       under the rules and regulations of the National Association of Securities
       Dealers (including the designation or maintenance criteria of the Nasdaq
       National Market) or any other self-regulatory organization applicable to
       Triangle;

              (g) Triangle has provided to Abbott a complete and accurate copy
       of each of the Triangle License Agreements;

              (h) to its knowledge, there are no material facts which Triangle
       has not disclosed to Abbott regarding the manufacture, use or sale of any
       Product or the practice of any inventions included in the Product Patents
       or the use of the Product Technology by Abbott, including without
       limitation any material facts regarding the possibility that such
       manufacture, use, sale or

                                      -62-

<PAGE>

       practice might infringe any Third Party's know-how, patent rights or
       other intellectual property in the Territories;

              (i) at no time during the Term shall Triangle enter into any
       transaction providing for debt financing which by its terms (A) imposes a
       lien, license, security interest or other encumbrance upon or (B)
       transfers any of the Product Patents or the Product Technology, except to
       the extent permitted by this Agreement; and

              (j) With respect to each of the Compounds, (A) Triangle has
       obtained and is in substantial compliance with all applicable
       registrations, applications, licenses, requests for exemption, permits or
       other regulatory authorizations with the FDA, or any state or local
       regulatory body necessary to conduct its business activities to date; and
       (B) to the extent any Compound is intended for export from the United
       States, and to the extent applicable, the Company is in compliance in all
       material respects with either all FDA requirements for marketing or as
       set forth in 21 U.S.C. ss.381(e) or 382; (ii) to the knowledge of
       Triangle, all manufacturing operations performed by or on behalf of
       Triangle have been and are being conducted in substantial compliance with
       the current good manufacturing practices issued by the FDA to the extent
       applicable; (iii) to the knowledge of Triangle, all nonclinical
       laboratory studies, as described in 21 C.F.R. ss.58.3(d), sponsored by
       Triangle have been and are being conducted in substantial compliance with
       the good laboratory practice regulations set forth in C.F.R. Part 58;
       except, in the preceding clauses (i) through (iii), where such failures
       to obtain or noncompliance, individually or in the aggregate, would not
       have a material adverse effect on Triangle's business activities with
       respect to such Compound.

              (k) Notwithstanding anything to the contrary in this Section 11.2
       or anything in any of the other Triangle-Abbott Alliance Agreements,
       *** (as defined in the Stock Purchase Agreement).

       11.3 NO OTHER WARRANTIES. EXCEPT AS OTHERWISE EXPRESSLY PROVIDED IN THIS
AGREEMENT, EACH PARTY MAKES NO OTHER WARRANTIES OR REPRESENTATIONS, INCLUDING
FITNESS FOR PURPOSE INTENDED OR MERCHANTABILITY, WHETHER EXPRESS OR IMPLIED.

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                                   ARTICLE 12
                             LIMITATION ON LIABILITY

EXCEPT AS OTHERWISE PROVIDED, NEITHER PARTY SHALL BE LIABLE FOR ANY SPECIAL,
INCIDENTAL, INDIRECT OR CONSEQUENTIAL LOSSES ARISING OUT OF OR RELATING TO THIS
AGREEMENT; PROVIDED HOWEVER, THIS LIMITATION SHALL NOT APPLY TO LOSSES ARISING
FROM THIRD PARTY CLAIMS FOR WHICH A PARTY IS INDEMNIFIED UNDER THE TERMS OF THIS
AGREEMENT.

                                   ARTICLE 13
                        CONFIDENTIALITY AND NONDISCLOSURE

       13.1 CONFIDENTIALITY OBLIGATION. Each of Abbott and Triangle (the
"Receiving Party") shall keep strictly confidential any information disclosed in
writing, orally, visually or in any other manner by the other Party (the
"Disclosing Party") or otherwise made available to the Receiving Party which the
Disclosing Party considers to be and treats as proprietary or confidential
("Confidential Information"). Without limiting the generality of the foregoing,
all proprietary information concerning the Disclosing Party's business,
operations, suppliers, products, product manufacture, sale, marketing or
distribution, trade secrets and intellectual property shall be considered
Confidential Information by the Receiving Party. Any data or other information
relating to or resulting from the clinical trials of the Products shall be
deemed to be Confidential Information of Triangle. The Disclosing Party shall
use commercially reasonable efforts to designate any written Confidential
Information disclosed to the other Party as Confidential Information by
prominently marking it "confidential", "proprietary" or the like, provided, that
the failure to so mark shall not exclude such written information from the
provisions of this Section 13. "Confidential Information" shall not include
information:

              (a) which is or becomes generally available to the public other
       than as a result of disclosure thereof by the Receiving Party;

              (b) which is lawfully received by the Receiving Party on a
       nonconfidential basis from a Third Party that is not itself under any
       obligation of confidentiality or nondisclosure to the Disclosing Party or
       any other Person with respect to such information;

              (c) which by written evidence can be shown by the Receiving Party
       to have been independently developed by or for the Receiving Party; or


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              (d) which the Receiving Party establishes by competent proof was
       in its possession at the time of disclosure by the other Party and was
       not acquired, directly or indirectly from the other Party.

All information, data and other materials disclosed by one Party to the other
pursuant to the Confidentiality Agreement, dated October 28, 1998, shall be
deemed to have been disclosed by the disclosing Party under this Agreement.

       13.2 NONDISCLOSURE OF CONFIDENTIAL INFORMATION. The Receiving Party shall
use Confidential Information solely for the purposes of this Agreement and shall
not disclose or disseminate any Confidential Information to any Third Party at
any time without the Disclosing Party's prior written consent, except for
disclosure to those of its directors, officers, employees, accountants,
attorneys, advisers, permitted sublicensees, and agents whose duties reasonably
require them to have access to such Confidential Information and, in the case of
Triangle, disclosure to the Triangle Licensors, provided that such directors,
officers, employees, accountants, attorneys, advisers, agents and Triangle
Licensors are required to use the Confidential Information solely for purposes
of this Agreement and maintain the confidentiality of such Confidential
Information to the same extent as if they were Parties hereto.

       13.3 EXCEPTION. The foregoing confidentiality and nondisclosure
obligations shall not apply to information which is required to be disclosed by
law or by regulation; provided, that (i) the Receiving Party gives the
Disclosing Party reasonable advance notice of the disclosure, to the extent
reasonably practicable and legally permissible; (ii) the Receiving Party uses
reasonable efforts to resist disclosing the Confidential Information; (iii) the
Receiving Party reasonably cooperates with the Disclosing Party on request to
obtain a protective order or otherwise limit the disclosure; and (iv) upon the
reasonable request of the Disclosing Party, the Receiving Party shall provide a
letter from its counsel confirming that the Confidential Information is, in
fact, required to be disclosed.

       13.4 INJUNCTIVE RELIEF. The Parties acknowledge that either Party's
breach of this Article 13 may cause the other Party irreparable injury for which
it would not have an adequate remedy at law. In the event of a breach, the
non-breaching Party shall be entitled to injunctive relief in addition to any
other remedies it may have at law or in equity.

       13.5 SCIENTIFIC AND OTHER PUBLICATIONS. Notwithstanding anything herein
to the contrary, it is the understanding of each Party that scientific,
scholarly and other related publications or presentations concerning the
development of the Compounds and the Products, including their pre-clinical and
clinical development, shall emanate solely from Triangle and the trials and
studies sponsored by Triangle and that,

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as against Abbott, Triangle shall have full control over the preparation, review
and approval of such publications and presentations, which publications and
presentations shall not be restricted hereunder; provided that, with respect to
joint Marketing Studies, as well as Supplemental Clinical Studies conducted by
Abbott or any studies involving any Abbott pharmaceutical products, any
resulting publication or presentation of data therefrom shall be jointly
reviewed and approved by Triangle and Abbott.

       13.6 SURVIVAL. The confidentiality and nondisclosure obligations of
this Article 13 shall survive the expiration or termination of this Agreement
and remain in effect for a period of *** following the expiration or
termination of this Agreement.

                                   ARTICLE 14
                                   TRADEMARKS

       14.1 TRIANGLE TRADEMARKS. Triangle shall be *** for each Product in
the Territories (the "Triangle Trademarks"). Triangle shall keep *** with
respect to its trademark activities and shall consult with Abbott through the
U.S. Marketing Board and/or the International Marketing Board, as applicable,
regarding the selection of trademarks for the Territories. Triangle shall
control all final decisions regarding its trademark activities. All
reasonable out-of-pocket costs and expenses associated with the selection,
filing, registration and maintenance of the trademarks for Products (i) in
the U.S. Territory shall be *** and (ii) in the International Territory shall
be ***. With respect to the International Territory, Triangle shall invoice
Abbott for all such costs and expenses, and Abbott shall pay to Triangle the
amount invoiced *** of the invoice date.

       14.2 LIMITED TRADEMARK LICENSE.

              (a) GRANT TO ABBOTT. Subject to the terms of this Agreement,
       Triangle hereby grants to Abbott (i) a nonexclusive limited license in
       the Territories to use Triangle's name and logo, (ii) a nonexclusive
       limited license in the U.S. Territory to use the Triangle Trademarks and
       (iii) an exclusive license in the International Territory to use the
       Triangle Trademarks, in each instance solely for the purpose of promoting
       distributing and selling the Products in the Territories in accordance
       with the terms and conditions of this Agreement. Abbott shall promote the
       Products in the Territories only under the Triangle Trademarks.

              (b) GRANT TO TRIANGLE. Abbott hereby grants to Triangle a
       nonexclusive limited license to use the Abbott name and logo solely for
       the purpose of promoting, distributing

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       and selling each Product in the Territories in accordance with the terms
       and conditions of this Agreement. Triangle shall promote the Products in
       the Territories only under the Triangle Trademarks.

       14.3 USE OF TRADE NAMES AND TRADEMARKS. Each Party recognizes that the
name and logo of each of the Parties and the Triangle Trademarks represents a
valuable asset of such entity and that substantial recognition and goodwill are
associated with each Party's name and logo and the Triangle Trademarks. Each
Party hereby agrees that, without prior written authorization of the other
Party, it shall not use the name and logo of the other Party for any purpose
other than the promotion, distribution and sale of the Products solely to the
extent required to fulfill its obligations under this Agreement. Abbott hereby
agrees that, without prior written authorization of Triangle, it shall not use
the Triangle Trademarks for any purpose other than the promotion, distribution
and sale of the Products solely to the extent required to fulfill its
obligations under this Agreement. In addition, Triangle shall only use the
Abbott name and logo in the form, manner and logotype approved in writing by
Abbott, and Abbott shall only use the Triangle name and logo and the Triangle
Trademarks in the form, manner and logotype approved in writing by Triangle.
Except for the limited licenses granted in Section 14.2, nothing in this
Agreement shall be construed as an assignment by Triangle to Abbott of any
right, title or interest in or to the Triangle name or logo or the Triangle
Trademarks, or an assignment by Abbott to Triangle of any right, title or
interest in or to the Abbott name or logo; it being understood that all right,
title and interest (including the goodwill associated therewith) in and to the
Triangle name and logo and the Triangle Trademarks is expressly reserved by
Triangle, and all right, title and interest (including the goodwill associated
therewith) in and to the Abbott name and logo is expressly reserved by Abbott.

       14.4 QUALITY MAINTENANCE. Each Party (a "licensed Party") agrees to
cooperate with the other Party (the "licensing Party") in facilitating the
licensing Party's quality assurance responsibilities by permitting reasonable
inspection of the licensed Party's operations as they pertain to the
licensing Party's trademarks and supplying licensing Party with specimens of
use of such trademarks upon reasonable request, but in any case no more often
than *** each calendar year. Each Party agrees to comply with all applicable
laws and regulations and obtain all government approvals pertaining to the
sale, distribution and advertising of Products offered in the Territories
under the Triangle Trademarks and covered by this Agreement.

       14.5 INJUNCTIVE RELIEF. Each Party acknowledges that a violation of this
Article 14 would cause irreparable harm to the other Party for which no adequate
remedy at law exists, and each Party therefore agrees that, in addition to any
other remedies available, and notwithstanding any other provision

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in this Agreement, the aggrieved Party shall be entitled to injunctive relief to
enforce the terms of this Article 14. If either Party prevails in any such
action, it shall be entitled to recover all costs and expenses, including
reasonable attorney's fees incurred because of any legal action arising in
relation to this Article 14.

       14.6 NOTIFICATION OF INFRINGEMENT AND ENFORCEMENT. Each Party shall
notify the other Party of any infringement or misuse of Triangle's Trademarks of
which such Party becomes aware. Triangle shall be solely responsible to
prosecute any infringement of the Triangle Trademarks. Any damage award or
settlement, in excess of Triangle's cost and expenses of enforcement, shall be
added to the U.S. Product Profit and/or the International Product Profit, as the
case may be, and shared between the Parties as set forth in this Agreement.

       14.7 TERMINATION OF TRADEMARK LICENSE. In the event that, pursuant to the
terms of this Agreement, Abbott forfeits its rights to Promote a Product in any
country, then its license under Section 14.2(a) shall automatically and
immediately terminate with respect to such country.

                                   ARTICLE 15
                                 INDEMNIFICATION

       15.1 INDEMNIFICATION

              (a) INDEMNIFICATION BY TRIANGLE. Except as may be otherwise
       provided herein, Triangle shall defend, indemnify and hold Abbott, all of
       its directors, officers and employees, and Abbott Sales Representatives
       (collectively the "Abbott Indemnitees") harmless from and against all
       Losses incurred in connection with any Third Party suits, claims or
       causes of action arising out of or resulting from:

                     (i) Triangle's breach of any representation, warranty,
              covenant, or other obligation provided for in this Agreement;

                     (ii) An infringement claim arising from Abbott's use of the
              Triangle name or logo or a Triangle Trademark in connection with
              the promotion or sale of the Products, provided Abbott's use is in
              compliance with the terms of this Agreement;

                     (iii) The negligence, recklessness or willful misconduct
              of Triangle and its directors, officers or employees or
              Triangle Sales Representatives, ***, its directors, officers or
              employees, or Triangle Sales Representatives; or

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                     (v) Any patent infringement claim arising from the
              manufacture, importation, use or sale of a Product, to the extent
              ***.

       Provided, however, that Triangle shall not be required to indemnify the
       Abbott Indemnitees to the extent that any Losses arise out of or result
       from: (A) the negligence, recklessness or willful misconduct of any of
       the Abbott Indemnitees, including, but not limited to, out-of label
       promotion of the Products, (B) utilization of process technology for the
       manufacture of Products which has not been approved by Triangle, (C)
       continued Promotion in a country after receipt of notice from Triangle
       indicating that the sale or Promotion of such Product in such country
       should be terminated because such further sale or Promotion would
       constitute willful infringement of a valid and issued patent in such
       country and/or (D) any breach by Abbott of this Agreement. Abbott shall
       not be considered negligent for purposes of this Section 15.1 if such
       claim arises solely with respect to the content of the Promotional
       Materials, Product labeling or other materials provided to Abbott by
       Triangle as long as Abbott has distributed or employed such Promotional
       Materials or other such materials as directed herein.

              (b) INDEMNIFICATION BY ABBOTT. Except as may be otherwise provided
       herein, Abbott shall defend, indemnify and hold Triangle, its directors,
       officers and employees, and Triangle Sales Representatives and the
       Triangle Licensors (collectively the "Triangle Indemnitees") harmless
       from and against all Losses incurred in connection with any Third Party
       suits, claims or causes of action arising out of or resulting from:

                     (i) Abbott's breach of any representation, warranty,
              covenant, or other obligation provided for in this Agreement;

                     (ii) An infringement claim arising from Triangle's use of
              the Abbott name or logo in connection with the promotion or sale
              of the Products, provided Triangle's use is in compliance with the
              terms of this Agreement;

                     (iii) The gross negligence, recklessness or willful
              misconduct of Abbott, its directors, officers or employees or
              Abbott Sales Representatives, including, ***,
              its Affiliates, their directors, officers or employees, or Abbott
              Sales Representatives; or

                     (iv) Any patent infringement claim arising from Abbott's or
              its Affiliates or permitted sublicensee's (A) utilization of
              process technology for the manufacture of

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              Products which has not been approved by Triangle or (B) continued
              Promotion in a country after receipt of notice from Triangle
              indicating that the sale or Promotion of such Product in such
              country should be terminated because such further sale or
              Promotion would constitute willful infringement of a valid and
              issued patent in such country.

         Provided, however, that Abbott shall not be required to indemnify the
         Triangle Indemnitees to the extent that any Losses arise out of or
         result from: (A) the negligence, recklessness or willful misconduct of
         any Triangle Indemnitee including, but not limited to, out-of label
         promotion of the Products; and/or (B) any breach by Triangle of this
         Agreement.

       15.2 INDEMNIFICATION PROCEDURE. Any Abbott Indemnitee or Triangle
Indemnitee, as the case may be, shall notify Triangle or Abbott (the
"Indemnifying Party") promptly in writing of an indemnifiable claim or cause of
action under Section 15.1(a) or 15.1(b) upon receiving notice or being informed
of the existence thereof. The Indemnifying Party shall assume, at its cost and
expense, the sole defense of such claim or cause of action through counsel
selected by the Indemnifying Party and reasonably acceptable to the other Party.
The Indemnifying Party shall maintain control of such defense, including any
decision as to settlement; provided that, in the event that the Indemnifying
Party does not diligently defend such claim or cause of action on a timely
basis, then, without prejudice to any other rights and remedies available to the
other Party under this Agreement, the other Party may take over such defense
with counsel of its choosing at the Indemnifying Party's cost and expense. The
other Party may, at its option and expense, participate in the Indemnifying
Party's defense, and if the other Party so participates, the Parties shall
cooperate with one another in such defense. The Indemnifying Party shall bear
the total costs of any court award or settlement of such claim or cause of
action and all other costs, fees and expenses related to the resolution thereof
(including reasonable attorneys' fees except for attorneys' fees for which the
other Party is responsible in the event that the other Party participates in the
Indemnifying Party's defense of such claim or cause of action). The
indemnification obligations herein shall apply on a first dollar basis without
limitation or reduction due to any deductible or self-insured retention which
Triangle or Abbott respectively may have under their respective insurance
coverage.

       15.3 PRODUCT LIABILITY. In the event of a product liability claim with
respect to a Product which is not covered by the foregoing indemnity provisions
in this Article 15, the Parties shall bear equally the amount of any awards or
other losses and costs attributable directly thereto. Abbott shall maintain
control of the defense of any such product liability claim with respect to the
International Territory and Triangle shall maintain control of the defense of
any such product liability claim with respect to the U.S. Territory.

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                                   ARTICLE 16
                              TERM AND TERMINATION

       16.1 TERM. The term of this Agreement shall commence on the Effective
Date and shall continue, unless terminated sooner in accordance with this
Article 16, until December 31, 2030 (the "Term").

       16.2 TERMINATION UPON PATENT EXPIRATION. Unless sooner terminated in
accordance with this Article 16, upon *** prior written notice, Abbott may
terminate this Agreement on a *** basis upon the expiration of the last to
expire patent covering such Product.

       16.3 TERMINATION FOR MATERIAL BREACH. It is the Parties' express
intent that consideration shall first and foremost be given to remedying any
breach of this Agreement through the payment of monetary damages or such
other legal or equitable remedies as shall be appropriate under the
circumstances and that there shall only be a limited right to terminate this
Agreement under the following circumstances as a matter of last resort. In
the event that the Neutral, in accordance with the procedures set forth in
Exhibit 20.3, has rendered a ruling that a Party has materially breached this
Agreement, which ruling specified the remedies imposed on such breaching
Party for such breach (the "Adverse Ruling"), and the breaching Party has
failed to comply with the terms of the Adverse Ruling within the time period
specified therein for compliance, or if such compliance cannot be fully
achieved by such date, the breaching Party has failed to commence compliance
and/or has failed to use diligent efforts to achieve full compliance as soon
thereafter as is reasonably possible (but in any event within ***), then the
non-breaching Party shall have the following rights:

              (a) where Abbott is the breaching Party that failed to comply with
       the Adverse Ruling and where the basis for such breach is Abbott's
       failure to abide by a material obligation under this Agreement, Triangle
       may terminate this Agreement and/or Abbott's license rights hereunder by
       delivering written notice to Abbott after the expiration of the period to
       comply; and

              (b) where Triangle is the breaching party that failed to comply
       with the Adverse Ruling and where the basis for such breach is Triangle's
       failure to abide by a material obligation under this Agreement, Abbott
       may terminate this Agreement and/or Triangle's license rights hereunder
       by delivering written notice to Triangle after the expiration of the
       period to comply.

       16.4 EFFECT OF EXPIRATION UNDER SECTION 16.1 OR TERMINATION UNDER SECTION
16.2. Upon the expiration of this Agreement under Section 16.1 or the
termination of this Agreement with respect to a particular Product or Products
under Section 16.2, unless instructed otherwise by Triangle in writing,

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Abbott shall continue to distribute such Product or Products for a period of
*** (the "Phase-Out Period"), unless such period is terminated earlier in
writing by Triangle. During such Phase-Out Period, Abbott shall continue to
fill all outstanding orders for the terminated Product or Products and refer
any new orders for such Product or Products to Triangle. During the Phase-Out
Period, Abbott shall not be required to perform any Details for the
terminated Product or Products and Abbott shall receive its share of the
Product Profits for the terminated Product or Products, unless Abbott was
terminated hereunder for its material breach of this Agreement. Abbott shall
promptly return all Promotional Materials and Sample Packs for the terminated
Product or Products to Triangle and shall delete the terminated Product or
Products from its catalogues and price lists as soon as reasonably practical.
In the event of any problems relating to the terminated Product or Products
or customer relations issue during the Phase-Out Period, Abbott shall
cooperate fully with Triangle to ensure customer satisfaction and compliance
with all Legal Requirements. Triangle shall be allowed to continue to
distribute Promotional materials and Sample Packs with the Abbott name in
accordance with Article 14 for up to *** after the termination or expiration
of this Agreement.

       16.5 EFFECT OF TERMINATION UNDER SECTION 16.3.

              (a) If this Agreement is terminated as a result of Abbott's breach
       (i) Abbott shall use its best efforts to destroy all data, writings and
       other documents and tangible materials supplied to Abbott by Triangle or
       the Triangle Licensors; and (ii) Abbott shall further, upon Triangle's
       request and with no need for additional consideration, grant Triangle a
       nonexclusive, royalty free (other than subject to royalty obligations
       payable to Third Parties) license (with the right to sublicense) to all
       Abbott Patents and Abbott Technology. Abbott shall further provide
       Triangle with full and complete copies of all toxicity, efficacy, and
       other data generated by Abbott or its permitted sublicensees, contractors
       or agents in the course of Abbott's efforts to obtain governmental
       approval for the sale of the Products, including but not limited to any
       registration filings or other documents filed with any government
       authority. Triangle and the Triangle Licensors shall be authorized to
       cross-reference any such registration filings made in the International
       Territory where permitted by law. Triangle and the Triangle Licensees
       shall be authorized to provide data pertaining to such patents and
       technology to any Third Party with a bona fide interest in licensing such
       technology. Such data shall be provided on a confidential basis;
       provided, however, that if such Third Party enters into a license with
       Triangle and the Triangle Licensees, such Third Party shall be free to
       use such data for all purposes, including to obtain government approvals
       to sell Products containing any Compound. Abbott shall cooperate

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       reasonably (at no unreimbursed expense to Abbott) with any Third Party
       licensee of Triangle or the Triangle Licensors in pursuing governmental
       approval to sell any Product containing any Compound, including but not
       limited to, permitting such Third Parties to cross-reference any
       regulatory filings filed with or any Product Approval obtained in any
       foreign countries; provided that any expenses incurred at the request of
       Triangle are reimbursed).

              (b) If this Agreement is terminated as a result of Abbott's
         breach, Triangle shall have the right, in its sole option, to
         terminate each or any of (i) the Co-Promotion Agreement; (ii) the
         Stock Purchase Agreement, to the extent that there are any
         continuing obligations thereunder; (iii) the Stockholder Rights
         Agreement (provided that the provisions contained in sections ***
         thereof shall survive such termination); and (iv) subject to its
         negotiation and due execution and delivery, the Supply Agreement.

              (c) If this Agreement is terminated as a result of Triangle's
         breach, Abbott shall have the right, in its sole option, to
         terminate each or any of (i) the Co-Promotion Agreement; (ii) the
         provisions of sections *** of the Stockholder Rights Agreement; and
         (iii) subject to its negotiation and due execution and delivery, the
         Supply Agreement.

       16.6 SURVIVAL. All rights granted and obligations undertaken by the
Parties hereunder shall terminate immediately upon the event of any termination
or expiration of this Agreement, except for the following which shall survive
according to their terms:

              (a) The obligation of each Party to pay to the other Party any and
       all payments accrued under this Agreement prior to such termination or
       expiration;

              (b) The provisions of Sections 6.1 and 6.2, which shall survive
       with respect to any reports required after the Term and any accrued or
       continuing payment obligations;

              (c) The limitations on liability of Article 12;

              (d) The confidentiality and nondisclosure obligations of Article
       13;

              (e) The indemnification obligations of Article 15 with respect to
       events occurring during the term of the Agreement;

              (f) The insurance obligations of Article 18; and

              (g) The provisions of Sections 4.2(f) (as well as Section 4.3 as
       its relates to Section 4.2(f) with respect to the International
       Territory), 7.5, 7.8, 16.4 through 16.7, 20.12, 20.3 and Section 20.11.

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Any termination of rights with respect to a particular Product shall only result
in the termination of rights and obligations hereunder as they relate to that
Product. In addition, expiration or termination of this Agreement shall not
affect the remedies of the Parties otherwise available at law or in equity in
relation to any rights accrued under this Agreement prior to expiration or
termination.

       16.7 NONEXCLUSIVE RIGHTS AND REMEDIES. Except as otherwise set forth in
this Agreement, all rights and remedies of the Parties provided under this
Agreement are not exclusive and are in addition to any other rights and remedies
provided by law or under this Agreement.

       16.8 CONDITIONS TO EFFECTIVENESS. The Effective Date shall be the date on
which the following conditions have been satisfied:

              (a) The obligations of Abbott and Triangle shall be subject to the
       satisfaction of the following conditions:

                     (i) No order, statute, rule, regulation, executive order,
              injunction, stay, decree or restraining order shall have been
              enacted, entered, promulgated or enforced by any court of
              competent jurisdiction or governmental or regulatory authority
              that prohibits the execution, delivery or performance of any of
              the Triangle-Abbott Alliance Agreements, and no proceeding by any
              governmental or regulatory authority or instrumentality shall be
              pending or threatened, which seeks to prohibit or declare illegal
              the execution, delivery or performance of any of the
              Triangle-Abbott Alliance Agreements;

                     (ii) All filings under the HSR Act and other laws of any
              jurisdiction applicable to the transactions contemplated in the
              Triangle-Abbott Alliance Agreements shall have been made and any
              required waiting period under such laws shall have expired or been
              earlier terminated;

                     (iii) The "Closing" as such term is defined in the Stock
              Purchase Agreement shall have occurred or shall be occurring
              simultaneously; and

                     (iv) The Supply Agreement shall be duly executed and
              delivered prior to or contemporaneously with the Closing.

              (b) CONDITIONS TO OBLIGATIONS OF ABBOTT. The obligations of Abbott
       shall be further subject to the satisfaction of the following conditions:


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                     (i) All corporate and other proceedings taken or to be
              taken in conjunction with the transactions contemplated in the
              Triangle-Abbott Alliance Agreements, and all documents incident
              thereto, shall be reasonably satisfactory in form and substance to
              Abbott;

                     (ii) ***;

                     (iii) The representations and warranties of Triangle
              contained herein and in the other Triangle-Abbott Alliance
              Agreements that are qualified as to materiality shall be true and
              correct at and as of the Effective Date as though restated on and
              as of the Effective Date and the representations and warranties of
              Triangle contained herein and in the other Triangle-Abbott
              Alliance Agreements that are not qualified as to materiality shall
              be true and correct in all material respects at and as of the
              Effective Date as though restated on and as of the Effective Date;

                     (iv) Abbott shall have received from ***

                     (v) Abbott shall have received from Triangle a copy of the
              executed consent identified in Section 9.2 and a certificate
              signed by an appropriate officer as to Triangle's compliance with
              the conditions set forth in clauses (i) and (iii) of this Section
              16.8(b).

              (c) CONDITIONS TO OBLIGATIONS OF TRIANGLE. The obligations of
       Triangle shall be further subject to the satisfaction of the following
       conditions:

                     (i) All corporate and other proceedings taken or to be
              taken in connection with the transactions contemplated in the
              Triangle-Abbott Alliance Agreements, and all documents incident
              thereto, shall be reasonably satisfactory in form and substance to
              Triangle;

                     (ii) The representations and warranties of Abbott contained
              herein and in the other Triangle-Abbott Alliance Agreements that
              are qualified as to materiality shall be true and correct at and
              as of the Effective Date as though restated on and as of the
              Effective Date and the representations and warranties of Abbott
              contained herein and in the other Triangle-Abbott Alliance
              Agreements that are not qualified as to materiality shall be true
              and correct in all material respects at and as of the Effective
              Date as though restated on and as of the Effective Date;

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                     (iii) Triangle shall have received from ***;

                     (iv) Triangle shall have received from ***;

                     (v) ***

                     (vi) Triangle shall have received from Abbott a certificate
              signed by an appropriate officer as to Abbott's compliance with
              the conditions set forth in clauses (i) and (ii) of this Section
              16.8(c).

              (d) NON-FULFILLMENT OF CONDITIONS. The non-fulfillment of any of
       the conditions described in this Section 16.8 (whether or not the
       Effective Date occurs) shall not result in any liability to any Party
       unless such non-fulfillment is a result of a breach of this Agreement or
       any of the other Triangle-Abbott Alliance Agreements by such Party.

              (e) OUTSIDE DATE. If the Effective Date has not occurred within
       *** from the execution date hereof (other than
       through the failure of the Party seeking to terminate this Agreement to
       comply fully with its obligations under this Agreement or any of the
       other Triangle-Abbott Alliance Agreements) or such later date as the
       Parties may agree, either Party may terminate this Agreement by written
       notice to the other Party.

                                   ARTICLE 17
                             TRANSFER OF TECHNOLOGY

       17.1 TRANSFER BY TRIANGLE. Within *** following the Effective Date and
as far as it has not previously done so, Triangle shall supply Abbott with
all Product Technology necessary for the manufacture of the Products in
Triangle's possession. With respect to any Product Technology subsequently
developed or obtained by Triangle during the Term of this Agreement, such
disclosure will be made at least on a quarterly basis or sooner, if
practicable.

       17.2 TECHNICAL ASSISTANCE.

              (a) Triangle shall, upon request by Abbott, provide Abbott with
       reasonable cooperation and assistance, consistent with the other
       provisions hereof, in connection with the transfer of Product Technology.
       Such assistance may include, but is not limited to, development

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

                                      -76-

<PAGE>

       of the formulations of the Products; procurement of supplies and raw
       materials; initial development and production batch manufacturing runs;
       process, specification and analytical methodology design and improvement;
       and, in general, such other reasonable assistance as may contribute to
       the efficient application by Abbott of the Product Technology. In this
       regard, Triangle agrees to make appropriate employees of Triangle
       reasonably available to assist Abbott, and Triangle agrees to provide
       reasonable numbers of appropriate Abbott personnel with access during
       normal business hours to the appropriate personnel and operations of
       Triangle for such periods of time as may be reasonable in order to
       familiarize Abbott personnel with the Product Technology as applied by
       Triangle. At Abbott's reasonable request, such assistance shall be
       furnished at Abbott's or its subcontractors' or permitted sublicensees'
       facilities in the Territories, subject to a mutually agreed upon
       schedule. Such technical assistance shall include but not be limited to
       the following:

                     (i) Triangle shall: (A) provide Abbott with access to any
              and all Drug Master File(s) or counterparts thereof in any
              countries of the Territories ("DMF") of Triangle relating to the
              manufacture of the Compounds existing as of the Effective Date;
              (B) provide Triangle with letters of authorization to the FDA and
              other applicable government authorities in other countries of the
              Territories to refer to Triangle's DMF's; and (C) reasonably
              cooperate with Abbott in obtaining access to and letters of
              authorization to refer to the DMF's of Triangle's subcontractors
              which are, or will be, supplying any Compounds or Products; and

                     (ii) Within *** after the Effective
              Date, Triangle shall provide Abbott with copies of all
              documentation in Triangle's possession, including all
              correspondence between Triangle and its subcontractors, regarding
              the manufacture of the Compounds or Products which would be
              necessary or useful to assist Abbott in the commercial production
              of the Compounds or Products or to support Product Approval.

              (b) During the period prior to the ***; (i) Triangle shall
         provide up to *** of such technical assistance during each year of
         such period at Triangle's sole expense and (ii) subsequent to such
         *** of technical assistance, Triangle shall provide such additional
         technical assistance as may be reasonably requested by Abbott;
         provided, that all reasonable out-of-pocket travel costs and
         expenses incurred by Triangle in rendering technical assistance
         pursuant to this Section 17.2(b) in excess of such *** per year
         shall be reimbursed to Triangle by Abbott. Technical

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

                                      -77-

<PAGE>

       assistance furnished pursuant to this Section 17.2(b) shall continue
         only until the *** of the Effective Date of this Agreement.

       17.3 TRANSFER BY ABBOTT. Abbott shall supply Triangle with any Abbott
Technology as developed during the Term on at least a quarterly basis or sooner,
if practicable.

       17.4 LANGUAGE OF DISCLOSURES. All disclosure pursuant to this Agreement
will be in English.

                                   ARTICLE 18
                                    INSURANCE

       On or before the Execution Date, each Party shall obtain, and each
Party shall maintain throughout the Term and each Phase-Out Period and for a
period of *** thereafter, insurance issued by independent insurers reasonably
selected by such Party providing the coverage and limits described in Exhibit
18. Each of the insurance policies for the types of coverage listed in
Exhibit 18, except statutory workers' compensation coverage, shall provide
that it may not be terminated, canceled or significantly modified unless the
other Party is given *** prior written notice by the insurance carrier. Each
Party's insurance coverage must be primary coverage without right of
contribution from any insurance of the other Party. On or before the date(s)
set forth in Exhibit 18, and each year thereafter for as long as this
Agreement, or any Phase-Out Period, is in effect, each Party shall provide
the other Party certificates of insurance evidencing the coverage and limits
required by this Article 18.

                                   ARTICLE 19
                                  FORCE MAJEURE

       If any circumstance beyond the reasonable control of either Party
occurs which delays or renders impossible the performance of certain of that
Party's obligations under this Agreement on the dates herein provided (a
"Force Majeure"), such obligations shall be postponed for such time as such
performance necessarily has had to be suspended or delayed on account
thereof, provided such Party shall notify the other Party in writing as soon
as practicable, but in no event more than *** after the occurrence of such
event of Force Majeure, which notice shall reasonably attempt to identify
such obligations under this Agreement and the extent to which performance
thereof will be affected. In such event, the Parties shall meet promptly to
determine an equitable solution to the effects of any such event, provided
that such Party who fails because of an event of Force Majeure to perform its
obligations hereunder shall upon the cessation of the Force Majeure event
take all reasonable steps within its power to resume with the least possible
delay compliance with its obligations. Events of Force Majeure shall include,
without limitation, war, revolution, invasion, insurrection, riots, mob
violence, sabotage or other

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

                                      -78-

<PAGE>

civil disorders, acts of God, limitations imposed by exchange control
regulations or foreign investment regulations or similar regulations, laws,
regulations or rules of any government or governmental agency, any inordinate
and unanticipated delays in the regulatory review or governmental approval
process that are within the sole control of such government or governmental
agency, any delay or failure in manufacture, production or supply by Third
Parties of any goods or services, any withdrawal or recall of a Product at the
direction of any governmental authority and any failure of a computer system.

                                   ARTICLE 20
                                  MISCELLANEOUS

       20.1 RELATIONSHIP OF THE PARTIES. Each of the Parties shall be furnishing
its services hereunder as an independent contractor, and nothing herein shall
create any association, partnership or joint venture between the Parties or any
employer-employee relationship. No agent, employee or servant of either Party
shall be or shall be deemed to be the employee, agent or servant of the other
Party, and each Party shall be solely and entirely responsible for its acts and
the acts of its employees.

       20.2 RELATIONSHIP WITH AFFILIATES. Unless the context otherwise
indicates, (i) any reference to a Party herein shall include the Affiliates of
such Party (including, without limitation, references to Abbott in Sections 1.5,
1.7, 1.9, 1.48 and 2.3(c) and references to Triangle in Sections 1.58, 1.59,
2.1, 2.2, 2.3(a), 2.3(b) and 2.5) and (ii) each Party may utilize the services
of its Affiliates to perform services, activities and/or obligations permitted
or required under this Agreement to the same extent as if such Affiliate were a
party to this Agreement; provided that any such services, activities or
obligations under this Agreement permitted or required to be performed by such
Party relating to the U.S. Territory will be performed only by such Party or a
wholly-owned U.S. subsidiary of such Party. Any Affiliates so utilized shall be
subject to all the terms and conditions applicable to such Party under this
Agreement, including but not limited to provisions establishing standards for
performance. With respect to the International Territory, Abbott may use its
Affiliates as set forth in this Section 20.2; provided that Abbott shall make
all payments required and provide all reports required under this Agreement. The
use of any Affiliates as set forth in this Section 20.2 shall in no way relieve
the applicable Party of any of its obligations or liabilities hereunder and each
Party shall be liable for the actions of its Affiliates under this Agreement and
the indemnification provisions of Article 15 shall apply with respect to all
actions of a Party's Affiliates under this Agreement.

       20.3 DISPUTE RESOLUTION.


                                      -79-

<PAGE>

              (a) GENERAL. The parties recognize that a bona fide dispute as to
       certain matters may arise from time to time during the term of this
       Agreement which may relate to either Party's rights and/or obligations
       hereunder. The Parties agree that they shall use all reasonable efforts
       to resolve any dispute which may arise in an amicable manner.

              (b) MANAGEMENT RESOLUTION. If the Parties are unable to resolve
       such a dispute within ***, either Party may, by notice to the other
       Party, have such dispute referred to the respective officers of the
       Parties designated below. Such officers shall attempt to resolve the
       referred dispute by good faith negotiations within *** after such
       notice is received. The said designated officers are as follows: For
       Abbott, Senior Vice President, Pharmaceutical Operations, for the U.S.
       Territory and Senior Vice President, International Operations for the
       International Territory, and for Triangle, Chief Executive Officer.

              (c) ALTERNATIVE DISPUTE RESOLUTION. The Parties agree that any
       dispute that arises in connection with this Agreement, which cannot be
       amicably resolved by such management discussions shall be resolved by
       binding Alternative Dispute Resolution ("ADR") in the manner described in
       Exhibit 20.3; provided, however, that the resolution of matters for which
       one Party to the exclusion of the other has the authority, under the
       terms of this Agreement, to control the decisions or the final decisions
       shall not be determined by ADR; provided, further, that either Party may
       seek judicial relief or enforcement to pursue a claim of fraudulent or
       otherwise inequitable treatment under the ADR proceedings or to otherwise
       enforce a judgment under the ADR proceedings (including without
       limitation a judgment for specific performance or injunctive relief).

       20.4 COUNTERPARTS. The Agreement may be executed simultaneously in any
number of counterparts and may be executed by facsimile. All counterparts shall
collectively constitute one and the same Agreement.

       20.5 NOTICES. In any case where any notice or other communication is
required or permitted to be given hereunder, such notice or communication shall
be in writing, and sent by overnight express or registered or certified mail
(with return receipt requested) and shall be sent to the following address (or
such other address as either Party may designate from time to time in writing):

              If to Triangle:

                    Triangle Pharmaceuticals, Inc.
                    4 University Place
                    4611 University Drive

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

                                      -80-

<PAGE>

                    Durham, North Carolina 27707
                    Telephone: (919) 493-5980
                    Telefax: (919) 493-5925
                    Attention: Chief Executive Officer
                    Copy to: General Counsel

              If to Abbott:

                    Abbott Laboratories
                    Dept. 309; Bldg. AP30
                    200 Abbott Park Road
                    Abbott Park, IL 60064
                    Telephone:  (847) 938-6863
                    Telefax:    (847)  938-5383
                    Attention:  Senior Vice President, Pharmaceutical Operations
                                and Senior Vice President, International
                                Operations

              Copy to:

                    General Counsel
                    Abbott Laboratories
                    Dept. 364; Bldg. AP6D
                    100 Abbott Park Road
                    Abbott Park, IL 60064
                    Telephone: (847) 937-8906
                    Telefax: (847) 938-6277

       20.6 BINDING EFFECT; ASSIGNMENT. This Agreement may not be assigned, in
whole or in part, by either Party without the prior written consent of the other
Party, and any attempted assignment without such consent shall be null and void;
provided that no prior written consent shall be required in the event that a
Third Party acquires substantially all of the assets or outstanding shares of,
or merges with, the assigning Party, but only so long as such Third Party agrees
to be bound by all of the assigning Party's responsibilities and obligations
hereunder. No assignment of this Agreement or of any rights hereunder shall
relieve the assigning party of any of its obligations or liability hereunder.
This Agreement shall inure to the benefit of and be binding upon each of the
Parties hereto and their respective successors and permitted assigns.

       20.7 ENTIRE AGREEMENT. The terms and conditions contained herein and in
the other Triangle-Abbott Alliance Agreements constitute the entire agreement
between the Parties relating to the subject matter of hereof and thereof and
shall supersede all previous communications between the Parties with respect to
the subject matter hereof and thereof, respectively. Neither Party has entered
into this Agreement in reliance upon any representation, warranty, covenant or
undertaking of the other Party that

                                      -81-

<PAGE>

is not set out or referred to in this Agreement. In addition, upon the request
of either Party, the Parties will discuss whether they desire to enter into an
agreement regarding the tax treatment of their activities under this Agreement.
If the Parties mutually agree that such an agreement is necessary or desirable,
they will each bear their own expenses incurred in connection with the
preparation of such an agreement, and (unless the Parties otherwise agree in the
future), any mutually agreed out-of-pocket costs incurred in connection with the
development of tax information pursuant to such an agreement shall be shared
equally. If only one Party believes that such an agreement is necessary or
desirable, that Party shall bear the costs of preparing such an agreement, and
shall bear the out-of-pocket costs of developing tax information pursuant to
such an agreement. In any event, each Party shall bear its own internal expenses
in connection with the negotiation and preparation of any such tax agreement and
the preparation of its own tax returns.

       20.8 AMENDMENT. The Agreement may be varied, amended or extended only by
the written agreement of the Parties through their duly authorized officers or
representatives, specifically referring to this Agreement.

       20.9 SEVERABILITY. In case any one or more of the provisions contained
herein shall, for any reason be held to be invalid, illegal or unenforceable in
any respect, such invalidity, illegality or unenforceability shall not affect
any other provision of this Agreement, but this Agreement shall be construed as
if such invalid, illegal or unenforceable provision or provisions had never been
contained herein unless the deletion of such provision or provisions would
result in such a material change as to cause completion of the transactions
contemplated herein to be impossible and provided that the performance required
by this Agreement with such clause deleted remains substantially consistent with
the intent of the Parties.

       20.10 COMPANY EMPLOYEES. Each Party shall not, directly or indirectly
solicit for employment, any employee of the other Party who has been directly
involved in the performance of this Agreement during the Term and for one year
after the earlier of the termination or expiration of this Agreement or the
termination of such individual's employment, with the other Party. It shall not
be a violation of this provision if any employee responds to a Party's general
advertisement of an open position.

       20.11 PUBLICITY. Except as otherwise provided herein, each Party shall
maintain the confidentiality of all provisions of this Agreement and this
Agreement itself and, without the prior written consent of both Parties, neither
Party shall make any press release or other public announcement of or otherwise
disclose to any Third Party this Agreement or any of its provisions except: (i)
for disclosure to those of its directors, officers, employees, accountants,
attorneys, advisers and agents whose duties


                                      -82-

<PAGE>

reasonably require them to have access to the Agreement and, in the case of
Triangle, disclosure to the Triangle Licensors, provided that such directors,
officers, employees, accountants, attorneys, advisers, agents and licensors are
required to maintain the confidentiality of the Agreement to the same extent as
if they were Parties hereto, and (ii) except for such disclosures as may be
required by Legal Requirements, in which case the disclosing Party shall provide
the nondisclosing Party with prompt advance notice of such disclosure so that
the nondisclosing Party shall have the opportunity if it so desires to seek a
protective order or other appropriate remedy and, in connection with any
disclosure to the Securities and Exchange Commission, the disclosing Party shall
use reasonable efforts to obtain confidential treatment for such disclosure.
Promptly following the execution of each of the Triangle-Abbott Alliance
Agreements, the Parties shall issue a mutually acceptable press release, a copy
of which is attached hereto as Exhibit 20.11.

       20.12 APPLICABLE LAW. The Agreement shall be governed by the laws of the
State of Delaware applicable to contracts made and to be performed entirely
within such jurisdiction and without giving effect to its choice or conflict of
laws rules or principles. If any action at law or in equity is necessary to
enforce or interpret the terms of this Agreement, the prevailing party shall be
entitled to reasonable attorneys' fees, costs and necessary disbursements, in
addition to any other relief to which the party may be entitled.

       20.13 MILLENNIAL COMPLIANCE. Each Party hereby covenants and agrees that
it will use Reasonable Best Efforts to ensure that there will be no failure or
erroneous receipt, storage, processing or production of data as a consequence of
the inability to receive, store, process or output date information regardless
of the date(s) utilized (including, without limitation, relating to the change
of century) in any computer software, computer hardware, automation systems or
other devices owned, licensed or otherwise used by such Party, its permitted
sublicensees or suppliers that would result in the inability of such Party to
either (i) comply with its obligations hereunder with respect to any
Confidential Information or any other data or information of other Party, or
(ii) successfully perform its obligations hereunder. At either Party's request,
the other Party agrees to disclose in reasonable detail its millennial
compliance plan and procedures, including but not limited to the applicable
testing results concerning its hardware and software systems.

       20.14 HEADINGS. The descriptive headings contained in this Agreement are
included for convenience of reference only and shall not affect the meaning or
interpretation of this Agreement.

       20.15 INTERPRETATION.


                                      -83-

<PAGE>

              (a) Wherever any provision of this Agreement uses the term
       "including" (or "includes"), such term shall be deemed to mean "including
       without limitation" and "including but not limited to" (or "includes
       without limitation" and "includes but is not limited to") regardless of
       whether the words "without limitation" or "but not limited to" actually
       follow the term "including" (or "includes").

              (b) Wherever any provision of this Agreement provides that a
       Party's consent shall not be unreasonably withheld, such provision shall
       be deemed to provide that such consent shall in addition not be
       unreasonably delayed.

              (c) The recitals set forth at the start of this Agreement, along
       with the Exhibits to this Agreement, and the terms and conditions
       incorporated in such recitals and Exhibits shall be deemed integral parts
       of this Agreement and all references in this Agreement to this Agreement
       shall encompass such recitals and Exhibits and the terms and conditions
       incorporated in such recitals and Exhibits.

              (d) In the event of any conflict between the terms and conditions
       of this Agreement and any terms and conditions that may be set forth on
       any order, invoice, verbal agreement or otherwise, the terms and
       conditions of this Agreement shall govern.

              (e) Unless otherwise explicitly stated, in the event of any
       conflict between the terms of this Agreement and the terms and conditions
       of any of the Exhibits hereto, the terms of this Agreement shall prevail.

              (f) The Agreement shall be construed as if both Parties drafted it
       jointly, and shall not be construed against either Party as principal
       drafter.

              (g) Unless otherwise provided, all references to Sections,
       Articles and Exhibits in this Agreement are to Sections, Articles and
       Exhibits of and to this Agreement.

       20.16 NO WAIVER OF RIGHTS. No failure or delay on the part of either
Party in the exercise of any power or right hereunder shall operate as a waiver
thereof. No single or partial exercise of any right or power hereunder shall
operate as a waiver of such right or of any other right or power. The waiver by
either Party of a breach of any provision of this Agreement shall not operate or
be construed as a waiver of any other or subsequent breach hereunder.


                                      -84-

<PAGE>

                    [Signatures appear on the following page]



                                      -85-

<PAGE>

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



TRIANGLE PHARMACEUTICALS, INC.





By:      /S/  DAVID W. BARRY
       ----------------------------------------------
Name:    DAVID W. BARRY
       ----------------------------------------------
Title:  CHAIRMAN AND CHIEF EXECUTIVE OFFICER
       ----------------------------------------------


ABBOTT LABORATORIES





By:      /S/  ARTHUR HIGGINS
       ----------------------------------------------
Name:    ARTHUR HIGGINS
       ----------------------------------------------
Title:   SENIOR VICE PRESIDENT
         PHARMACEUTICAL OPERATIONS
       ----------------------------------------------

<PAGE>


                                                                EXHIBIT 1.8A

                         U.S. SG&A - EXPENSE DEFINITIONS


***


- -----------
*   Not included in budget pursuant to ***

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

<PAGE>


                                                               EXHIBIT 1.8B

             U.S. TERRITORY - SG&A * - VARIABLE SALES FORCE EXPENSE


VARIABLE SALES FORCE EXPENSE


Base expense shall be set at $***/Representative adjusted
with an annual cost of living index using the Consumer Price Index (CPI). Such
expense may be reviewed and adjusted as necessary by ***.
This expense includes the following items:


o        ***
o        ***
o        ***
o        ***
o        ***
o        ***
o        ***
o        ***


NOTES:

(a)      ***
         ***
         ***

(b)      *** Expense includes: ***

(c)      *** includes: ***


*    SG&A definition for this contract only. Party's definition for external
     reporting may be different.

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

<PAGE>


                                  EXHIBIT 1.8C

               INTERNATIONAL TERRITORY - SG&A CREDIT ANALYSIS (1)

(A)      MARKETING/SALES/ADMIN (PURSUANT TO SECTION 1.8(J))

         Maximum costs (per product) excluding B&C below. These costs will
         reflect similar expenses as outlined in Exhibit 1.8A, but will be
         provided in aggregate not by line item. Expenses will also be
         identified for Marketing Studies (permitted under Section 4.4) and
         Expanded Access / Indigent Care (permitted under Section 4.6)

         HIV PRODUCTS (2)(3)

***
***
***

         HBV PRODUCTS (2)(3)

***
***
***

(B) R&D / REGULATORY:

***
***

(C) OTHER:

***
***
***


(1)  SG&A definition for this contract only. The Parties' definition for
     external reporting may be different.

(2)  Amounts indexed for inflation. 1999 is the base year for the inflation
     calculation.

(3)  The amounts included are for illustrative purposes. Actual amounts will be
     determined pursuant to Section 4.3(b). Expenses are Abbot's best estimates.
     These estimates are subject to change based on clinical date and final
     launch plans.

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

<PAGE>


                                  EXHBIIT 1.16

                                  DAPD FORMULA


                            ***

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

<PAGE>


                                                               EXHIBIT 1.89
                                                              (PAGE 1 OF 4)


                            MKC-442 LICENSE AGREEMENT

EARNED ROYALTIES

o   *** of Licensed Products(1)

ANNUAL ***

<TABLE>
<CAPTION>

Full Calendar Year Following First
FDA Approval of Licensed Products            Annual  ***
- ----------------------------------           --------------------------------
<S>                                         <C>
***
***
***

</TABLE>


(1) As defined in the MKC-442 License Agreement

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

<PAGE>


                                                                EXHIBIT 1.89
                                                               (PAGE 2 OF 4)

                             DAPD LICENSE AGREEMENT

                         Cumulative Net Selling Price of

<TABLE>
<CAPTION>

Earned Royalties                            Licensed Products (1) for
(% of Net Selling Price(1))                    the HIV Indication
<S>                                         <C>
***
***
***

</TABLE>


*** ROYALTIES FOR THE HIV INDICATION

<TABLE>
<CAPTION>
Calendar Year from First FDA Approval                ***
Of a Licensed Product for HIV Indication                      Amount
<S>                                                   <C>
***                              ***
***                              ***
***                              ***

</TABLE>


<TABLE>
<CAPTION>
                                             Cumulative Net Selling Price of
Earned Royalties                                 Licensed Products(1) for
(% of Net Selling Price(1))                         the HBV Indication
- -------------------------                   ----------------------------------
<S>                                         <C>
***                              ***
***                              ***
***                              ***

</TABLE>


*** FOR THE HBV INDICATION

<TABLE>
<CAPTION>

Calendar Year from First FDA Approval              ***
Of a Licensed Product for HBV Indication                   Amount
<S>                                                 <C>
***                              ***
***                              ***
***                              ***

</TABLE>

(1)  As defined in the DAPD License Agreement

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

<PAGE>


                                                               EXHIBIT 1.89
                                                              (PAGE 3 OF 4)

                              FTC LICENSE AGREEMENT

<TABLE>
<CAPTION>

                                        Annual Aggregate Net Selling Price
Earned Royalties                              of Licensed Products(1)
(% of Net Selling Price(1))                     for HIV Indication
<S>                                     <C>
***                              ***
***                              ***
***                              ***

</TABLE>

*** ROYALTIES FOR THE HIV INDICATION

<TABLE>
<CAPTION>

Calendar Year from First FDA Approval                ***
Of a Licensed Product for HIV Indication                     AMOUNT
<S>                                                   <C>
***                              ***
***                              ***
***                              ***

</TABLE>

<TABLE>
<CAPTION>

                                            Annual Aggregate Net Selling Price
Earned Royalties                                of Licensed Products(1)
(% of Net Selling Price(1))                        for HBV Indication
<S>                                         <C>
***                              ***
***                              ***
***                              ***

</TABLE>

*** ROYALTIES FOR THE HBV INDICATION

<TABLE>
<CAPTION>

Calendar Year for First FDA Approval                  ***
Of a Licensed Product for HBV Indication                      AMOUNT
<S>                                                    <C>
***                              ***
***                              ***
***                              ***

</TABLE>


(1)  As defined in the FTC License Agreement

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.


<PAGE>


                                                               EXHIBIT 1.89
                                                              (PAGE 4 OF 4)

                            L-FMAU LICENSE AGREEMENT


Earned Royalties

*** of Licensed Products(1)

*** Royalties

<TABLE>
<CAPTION>

Full Calendar Year following First
FDA Approval of a Licensed Product                   ***
<S>                                                   <C>
***                              ***
***                              ***
***                              ***

</TABLE>


(1)  As defined in the L-FMAU License Agreement

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.


<PAGE>


                                                                 EXHIBIT 2.6

                             COLLABORATION AGREEMENT
                              COMBINATION PRODUCTS
                 FINANCIAL ANALYSIS OF LONG-TERM FINANCIAL PLAN


Assumes satisfaction of all conditions required by Section 2.6(b) including the
Abbott and Triangle market on an exclusive basis in accordance with the terms of
the Triangle-Abbott Alliance Agreements.

<TABLE>
<S>                                          <C>
ANALYSIS WITH COMBINATION PRODUCT:


***
***
***


ANALYSIS WITHOUT COMBINATION PRODUST (2):

***
***
***

</TABLE>


(1) ***
(2) ***

CONCLUSION:

Based on the above analysis the project would have an additive economic impact
and would satisfy the requirements of Section 2.6.

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.


<PAGE>


                                                                EXHIBIT 6.9

                               U.S. PROFIT SHARING
                                   1ST QUARTER
                                   (MILLIONS)

<TABLE>
<CAPTION>

U.S. PROFIT SPLIT:                ABBOT                  TRIANGLE
<S>                             <C>                      <C>

***
***
***

</TABLE>


ASSUMPTIONS:


***
***
***

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<PAGE>


                                                                EXHIBIT 6.9

                               U.S. PROFIT SHARING
                                   2ND QUARTER
                                   (MILLIONS)

<TABLE>
<CAPTION>

U.S. PROFIT SPLIT:                ABBOT                  TRIANGLE
<S>                             <C>                      <C>

***
***
***

</TABLE>


ASSUMPTIONS:


***
***
***

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<PAGE>


                                                                EXHIBIT 6.9

                               U.S. PROFIT SHARING
                                   3RD QUARTER
                                   (MILLIONS)


<TABLE>
<CAPTION>

U.S. PROFIT SPLIT:                ABBOT                  TRIANGLE
<S>                             <C>                      <C>

***
***
***

</TABLE>


ASSUMPTIONS:


***
***
***

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<PAGE>


                                                                EXHIBIT 6.9

                               U.S. PROFIT SHARING
                                   4TH QUARTER
                                   (MILLIONS)


<TABLE>
<CAPTION>

U.S. PROFIT SPLIT:                ABBOT                  TRIANGLE
<S>                             <C>                      <C>

***
***
***

</TABLE>


ASSUMPTIONS:


***
***
***

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<PAGE>


                                                               EXHIBIT 6.9

                          INTERNATIONAL PROFIT SHARING
                                   1ST QUARTER
                                   (MILLIONS)

<TABLE>
<CAPTION>

U.S. PROFIT SPLIT:                ABBOT                  TRIANGLE
<S>                             <C>                      <C>

***
***
***

</TABLE>


ASSUMPTIONS:


***
***
***

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<PAGE>


                                                                EXHIBIT 6.9

                          INTERNATIONAL PROFIT SHARING
                                   2ND QUARTER
                                   (MILLIONS)


<TABLE>
<CAPTION>

U.S. PROFIT SPLIT:                ABBOT                  TRIANGLE
<S>                             <C>                      <C>

***
***
***

</TABLE>


ASSUMPTIONS:


***
***
***

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<PAGE>


                                                                EXHIBIT 6.9

                          INTERNATIONAL PROFIT SHARING
                                   3RD QUARTER
                                   (MILLIONS)

<TABLE>
<CAPTION>

U.S. PROFIT SPLIT:                ABBOT                  TRIANGLE
<S>                             <C>                      <C>

***
***
***

</TABLE>


ASSUMPTIONS:


***
***
***

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<PAGE>


                                                                EXHIBIT 6.9

                          INTERNATIONAL PROFIT SHARING
                                   4TH QUARTER
                                   (MILLIONS)


<TABLE>
<CAPTION>

U.S. PROFIT SPLIT:                ABBOT                  TRIANGLE
<S>                             <C>                      <C>

***
***
***

</TABLE>


ASSUMPTIONS:


***
***
***

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<PAGE>


                                                                EXHIBIT 6.9

                   INTERNATIONAL REIMBURSEMENT ACCOUNT EXAMPLE

***

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<PAGE>


                                                                EXHIBIT 6.9


INTERNATIONAL REIMBURSEMENT ACCOUNT EXAMPLE

***

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<PAGE>


                                   EXHIBIT 9.2

                                     FORM OF

                              CONSENT AND AGREEMENT

              This Consent and Agreement is made as of the date written below,
by and among [Licensor] ("Licensor"), Triangle Pharmaceuticals, Inc., a Delaware
corporation ("Triangle") and Abbott Laboratories, an Illinois corporation
("Abbott").

              WHEREAS, Licensor and Triangle are parties to a certain License
Agreement dated ___________ [as amended __________] (the "License Agreement");
and

              WHEREAS, Triangle desires to grant and Abbott desires to accept a
sublicense of certain rights under the License Agreement, with respect to a
collaboration (the "Collaboration") between Abbott and Triangle;

              NOW, THEREFORE, the parties hereby agree as follows:

1.       BRIEF DESCRIPTION

              As part of the Collaboration, Triangle will sublicense to Abbott
and its affiliates (the "Abbott Parties") certain rights ("Rights") to utilize
certain patents and technology relating to the distribution, promotion,
manufacturing and sale of pharmaceutical products containing the Compound (as
defined in the License Agreement), including but not limited to:

         o    the exclusive right to commercially sell and distribute the
              Compound and pharmaceutical products containing the Compound
              throughout the world, [except for _______];

         o    the exclusive right to co-promote the Compound and pharmaceutical
              products containing the Compound, along with Triangle, in the
              United States;

         o    the exclusive right to promote the Compound and pharmaceutical
              products containing the Compound outside the United States,
              [except for _________]; and

         o    the exclusive right outside the United States, [except for
              ________, to utilize certain patents and technology to import,
              use, offer to sell, sell, make and have made the Compounds and
              pharmaceutical products containing the Compound within the [Field
              of Use], with respect to which Abbott intends to use its
              affiliates.

              Triangle will retain control of and responsibility for the
clinical development of the Compound and pharmaceutical products containing the
Compound. Triangle will retain responsibility for the filing, obtaining and
maintaining of governmental approval of the Compound and pharmaceutical products
containing the Compound in the United States, and the Abbott Parties will have
responsibility for the filing, obtaining and maintaining of governmental
approval of the Compound and the pharmaceutical products containing the Compound
outside of the United States, [except for ________].

2.       COVENANTS/UNDERTAKINGS

***

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<PAGE>


3.       CONSENT AND AGREEMENT

              Licensor hereby consents to the Collaboration, including the grant
to the Abbott Parties of a sublicense under the License Agreement pursuant to
the Collaboration.

              Licensor agrees that the Abbott Parties, in their capacity as
sublicensees, shall have the right to perform Triangle's rights and obligations
under the License Agreement in the Abbott Parties' capacity as sublicensees.


4.       CONFIDENTIALITY

              Licensor acknowledges that the information contained herein and
all of the terms of the Collaboration are deemed confidential and proprietary
information under the License Agreement.


Dated:

LICENSOR

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

By:
   --------------------------------------
Name:
     ------------------------------------

Title:
      -----------------------------------



TRIANGLE PHARMACEUTICALS, INC.              ABBOTT LABORATORIES

By:                                         By:
   ------------------------------              ----------------------------

Name:                                       Name:
     ----------------------------                --------------------------

Title:                                      Title:
      ---------------------------                 -------------------------

<PAGE>


                                                     Collaboration Agreement
                                                             Exhibit 11.2(e)
                                                                 Page 1 of 3


                    TRIANGLE PATENTS AND PATENT APPLICATIONS


***

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    Confidential Treatment and filed separately with the Commission.


<PAGE>


                                                    Collaboration Agreement
                                                            Exhibit 11.2(e)
                                                                Page 2 of 3


                    TRIANGLE PATENTS AND PATENT APPLICATIONS
                            INTER PARTES PROCEEDINGS



***

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    Confidential Treatment and filed separately with the Commission.


<PAGE>


                                                    Collaboration Agreement
                                                            Exhibit 11.2(e)
                                                               Pages 3 of 3


                                TRADEMARK ISSUES


***

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    Confidential Treatment and filed separately with the Commission.


<PAGE>


***

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    Confidential Treatment and filed separately with the Commission.


<PAGE>


***

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    Confidential Treatment and filed separately with the Commission.


<PAGE>


***

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    Confidential Treatment and filed separately with the Commission.


<PAGE>


                                                       Exhibit 16.8(c)(iii)


***

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    Confidential Treatment and filed separately with the Commission.


<PAGE>


***

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    Confidential Treatment and filed separately with the Commission.


<PAGE>


                                                        Exhibit 16.8(c)(iv)


***

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    Confidential Treatment and filed separately with the Commission.


<PAGE>


***

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    Confidential Treatment and filed separately with the Commission.


<PAGE>


                                                    Collaboration Agreement
                                                                 Exhibit 18


                                    INSURANCE


to be delivered ***


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    Confidential Treatment and filed separately with the Commission.


<PAGE>


                                                      COLLABORATION AGREEMENT

                                  EXHIBIT 20.3

                         ALTERNATIVE DISPUTE RESOLUTION

         The parties recognize that a bona fide dispute as to certain matters
may arise from time to time during the term of this Agreement which relates to
either party's rights and/or obligations. To have such a dispute resolved by
this Alternative Dispute Resolution ("ADR") provision, a party first must send
written notice of the dispute to the other party for attempted resolution by
good faith negotiations between their respective presidents (or their
equivalents) of the affected subsidiaries, divisions, or business units within
*** after such notice is received (all references to "days"
in this ADR provision is to calendar days).

         Any negotiations regarding a dispute shall be treated as settlement
negotiations for purposes of the Federal Rules of Evidence and any similar state
rules of evidence. Such negotiations shall not be admissible in any subsequent
ADR hearing.

         If the matter has not been resolved within ***
of the notice of dispute, or if the parties fail to meet within such
*** either party may initiate an ADR proceeding as
provided herein. The parties shall have the right to be represented by
counsel in such a proceeding.

1.       To begin an ADR proceeding, a party shall provide written notice to
         the other party of the issues to be resolved by ADR. Within ***
         after its receipt of such notice, the other party may, by written
         notice to the party initiating the ADR, add additional issues to be
         resolved within the same ADR.

2.       Within *** following receipt of the original ADR notice, the parties
         shall select a mutually acceptable neutral (the "Neutral") to
         preside in the resolution of any disputes in this ADR proceeding. If
         the parties are unable to agree on a mutually acceptable neutral
         within such period, the parties shall request the *** to select a
         neutral pursuant to the following procedures:

         (a)  The CPR shall submit to the parties a list of not less than ***
              candidates within *** after receipt of the request from the
              parties, along with a Curriculum Vitae for each candidate. No
              candidate shall be an employee, director, or shareholder of
              either party or any of their subsidiaries or affiliates.

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<PAGE>


         (b)  Such list shall include a statement of disclosure by each
              candidate of any circumstances likely to affect his or her
              impartiality.

         (c)  Each party shall number the candidates in order of preference
              (with the number one (1) signifying the greatest preference)
              and shall deliver the list to the CPR within *** following
              receipt of the list of candidates. If a party believes a
              conflict of interest exists regarding any of the candidates,
              that party shall provide a written explanation of the conflict
              to the CPR along with its list showing its order of preference
              for the candidates. Any party failing to return a list of
              preferences on time shall be deemed to have no order of
              preference.

         (d)  If the parties collectively have identified fewer than ***
              candidates deemed to have conflicts, the CPR immediately shall
              designate as the neutral the candidate for whom the parties
              collectively have indicated the greatest preference. If a tie
              should result between two candidates, the CPR may designate
              either candidate. If the parties collectively have identified
              *** or *** candidates deemed to have conflicts, the CPR shall
              review the explanations regarding conflicts and, in its sole
              discretion, may either (i) immediately designate as the neutral
              the candidate for whom the parties collectively have indicated
              the greatest preference, or (ii) issue a new list of not less
              than five (5) candidates, in which case the procedures set
              forth in subparagraphs 2(a) - 2(d) shall be repeated.

3.       No earlier than *** or later than *** after selection, the neutral
         shall hold a hearing to resolve each of the issues identified by the
         parties. The ADR proceeding shall take place at a location agreed
         upon by the parties. If the parties cannot agree, the neutral shall
         designate a location other than the principal place of business of
         either party or any of their subsidiaries or affiliates.

4.       At least *** prior to the hearing, each party shall submit the
         following to the other party and the neutral:

         (a)  a copy of all exhibits on which such party intends to rely in any
              oral or written presentation to the neutral;

         (b)  a list of any witnesses such party intends to call at the hearing,
              and a short summary of the anticipated testimony of each witness;

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                                      -2-

<PAGE>


         (c)  a proposed ruling on each issue to be resolved, together with a
              request for a specific damage award or other remedy for each
              issue. The proposed rulings and remedies shall not contain any
              recitation of the facts or any legal arguments and shall not
              exceed one (1) page per issue.

         (d)  a brief in support of such party's proposed rulings and remedies,
              provided that the brief shall not exceed twenty (20) pages. This
              page limitation shall apply regardless of the number of issues
              raised in the ADR proceeding.

Except as expressly set forth in subparagraphs 4(a) - 4(d), no discovery shall
be required or permitted by any means, including depositions, interrogatories,
requests for admissions, or production of documents.

5.       The hearing shall be conducted on *** and shall be governed by the
         following rules:

         (a)  Each party shall be entitled to *** of hearing time to present
              its case. The neutral shall determine whether each party has
              had the *** to which it is entitled.

         (b)  Each party shall be entitled, but not required, to make an opening
              statement, to present regular and rebuttal testimony, documents or
              other evidence, to cross-examine witnesses, and to make a closing
              argument. Cross-examination of witnesses shall occur immediately
              after their direct testimony, and cross-examination time shall be
              charged against the party conducting the cross-examination.

         (c)  The party initiating the ADR shall begin the hearing and, if it
              chooses to make an opening statement, shall address not only
              issues it raised but also any issues raised by the responding
              party. The responding party, if it chooses to make an opening
              statement, also shall address all issues raised in the ADR.
              Thereafter, the presentation of regular and rebuttal testimony and
              documents, other evidence, and closing arguments shall proceed in
              the same sequence.

         (d)  Except when testifying, witnesses shall be excluded from the
              hearing until closing arguments.

         (e)  Settlement negotiations shall not be admissible under any
              circumstances. Affidavits prepared for purposes of the ADR hearing
              also shall not be

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                                      -3-

<PAGE>


              admissible. As to all other matters, the neutral shall have sole
              discretion regarding the admissibility of any evidence.

6.       Within *** following completion of the hearing, each party may
         submit to the other party and the neutral a post-hearing brief in
         support of its proposed rulings and remedies (which may include
         specific performance and/or injunctive relief), provided that such
         brief shall not contain or discuss any new evidence and shall not
         ***. This page limitation shall apply regardless of the number of
         issues raised in the ADR proceeding.

7.       The neutral shall rule on each disputed issue within *** following
         completion of the hearing. Such ruling shall adopt in its entirety
         the proposed ruling and remedy of one of the parties on each
         disputed issue but may adopt one party's proposed rulings and
         remedies on some issues and the other party's proposed rulings and
         remedies on other issues. The neutral shall not issue any written
         opinion or otherwise explain the basis of the ruling.

8.       The neutral shall be paid a reasonable fee plus expenses. These fees
         and expenses, along with the reasonable legal fees and expenses of the
         prevailing party (including all expert witness fees and expenses), the
         fees and expenses of a court reporter, and any expenses for a hearing
         room, shall be paid as follows:

         (a)  If the neutral rules in favor of one party on all disputed issues
              in the ADR, the losing party shall pay 100% of such fees and
              expenses.

         (b)  If the neutral rules in favor of one party on some issues and the
              other party on other issues, the neutral shall issue with the
              rulings a written determination as to how such fees and expenses
              shall be allocated between the parties. The neutral shall allocate
              fees and expenses in a way that bears a reasonable relationship to
              the outcome of the ADR, with the party prevailing on more issues,
              or on issues of greater value or gravity, recovering a relatively
              larger share of its legal fees and expenses.

9.       The rulings of the neutral and the allocation of fees and expenses
         shall be binding, non-reviewable, and non-appealable, and may be
         entered as a final judgment in any court having jurisdiction.

10.      Except as provided in paragraph 9 or as required by law, the existence
         of the dispute, any settlement negotiations, the ADR hearing, any
         submissions (including exhibits, testimony, proposed rulings, and
         briefs), and the rulings shall be deemed Confidential Information. The


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                                      -4-

<PAGE>


         neutral shall have the authority to impose sanctions for unauthorized
         disclosure of Confidential Information.


                                      -5-


<PAGE>

                                                                     EXHIBIT 2.2

                                CO-PROMOTION AGREEMENT

     This Co-Promotion Agreement (the "Agreement") is made as of June 2, 1999 by
and between Triangle Pharmaceuticals, Inc., a Delaware corporation ("Triangle"),
with its principal offices at 4 University Place, 4611 University Drive, Durham,
North Carolina 27707, and Abbott Laboratories, an Illinois corporation
("Abbott"), with its principal offices at 100 Abbott Park Road, Abbott Park,
Illinois 60064, each acting on behalf of itself and its Affiliates.  As used
herein, any reference to a party shall include the Affiliates of such party.

WITNESSETH

     WHEREAS, Abbott is marketing Norvir-Registered Trademark-, a protease
inhibitor for the treatment of HIV in the United States;

     WHEREAS, Abbott has under development ABT-378, another protease inhibitor
for the treatment of HIV;

     WHEREAS, Abbott desires, and Triangle is willing, to co-promote Norvir and
ABT-378, pursuant to the terms and conditions of this Agreement,

     NOW, THEREFORE, in consideration of the foregoing and the mutual covenants
and undertakings contained herein, the parties hereto hereby agree as follows:

                                      ARTICLE 1

                                     DEFINITIONS

     In addition to the other terms defined elsewhere herein, the following
terms shall have the following meanings when used in this Agreement (and any
term defined in the singular shall have the same meaning when used in the
plural, and vice versa, unless stated otherwise):

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<PAGE>

                                         -2-


     1.1   "ABT-378" shall mean the chemical compound known as     ***, which
is being developed by Abbott as a pharmaceutical product     ***     for the
treatment of HIV.

     1.2   "Abbott Net Sales" shall mean the total gross sales of each Product
(as set forth on the invoice for such Product) in the Territory by Abbott to
Third Parties during the given calendar quarter or year, less the following
deductions directly paid or incurred by Abbott with respect to the sale of such
Product in the United States during such calendar quarter or year:

           (i)   ***

           (ii)  ***     or otherwise, imposed by government authorities;

           (iii) ***     where there are no direct shipments to such customers
                 by Abbott; and

           (iv)  the portion of any     ***     paid during the relevant time
                 period to     ***     that relate specifically to the sale of
                 the Products to such     ***     .

Abbott Net Sales shall be calculated separately for each Product.

     1.3   "Abbott Trademarks" shall have the meaning set forth in
Section 11.1.

     1.4   "Active Detailing Period" shall mean, with respect to each of Norvir
and ABT-378, a period of      ***      for such Product.

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    Confidential Treatment and filed separately with the Commission.

<PAGE>

                                        - 3 -


     1.5   "Affiliate" shall mean any corporation or non-corporate business
entity which controls, is controlled by, or is under common control with a
Party.  A corporation or non-corporate business entity shall be regarded as in
control of another corporation or non-corporate business entity if it owns, or
directly or indirectly controls, at least     ***     of the voting stock of the
other corporation, or (a) in the absence of the ownership of at least     ***
of the voting stock of a corporation or (b) in the case of a non-corporate
business entity, if it possesses, directly or indirectly, the power to direct or
cause the direction of the management and policies of such corporation or
non-corporate business entity, as applicable.  For purposes of this Agreement,
  ***    , which comprise Abbott's joint venture with     ***     , are not
Affiliates of Abbott.

     1.6   "Average Script Size" shall mean with respect to each Product, the
number of Units of Product determined for a given Sales Year or Residual Year by
dividing (i) total number of Units of such Product dispensed during such year by
(ii) the total number of prescriptions of such Product during such year, with
items (i) and (ii) being determined from     ***     .

     1.7   "Average Selling Price" shall mean, with respect to each Product,
the price per Unit of Product determined for a given Sales Year or Residual Year
by dividing the Net Sales of such Product for such year by the Net Units of such
Product for such year.

     1.8   "Co-Promote" or "Co-Promotion" shall mean the joint activities of
the Parties to Promote the Products under the Abbott Trademarks in the
Territory.

     1.9   "Co-Promotion Budget" shall have the meaning set forth in
Section 4.3.

     1.10  "Co-Promotion Committee" shall have the meaning set forth in
Section 4.2.

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<PAGE>

                                        - 4 -


     1.11  "Co-Promotion Date" shall mean, with respect to each Product, the
date on which the Parties begin to Co-Promote such Product.

     1.12  "     ***     " shall mean the     ***     designated by the Parties
for each Sales Year as the     ***     from Triangle and Abbott shall be
***     .  The     ***     shall be designated in writing by the Parties prior
to the start of each Sales Year.  For each Residual Year, the     ***     shall
be those     ***     comprising the     ***     for the     ***     Sales Year
of the Active Detailing Period.

     1.13  "Co-Promotion Plan" shall have the meaning set forth in Section 4.4.

     1.14  "Condition" shall have the meaning set forth in Section 2.1.

     1.15  "Confidential Information" shall have the meaning set forth in
Section 10.1.

     1.16  "Detail" shall mean a face-to-face sales presentation by a Sales
Representative during which one or more of the Products is marketed and promoted
to a licensed medical physician, but not a resident or intern or other health
care professional, unless such individual has the authority to write
prescriptions for the Products pursuant to state statutes.  Attendance at
meetings with managed care entities, conventions and participation in continuing
education programs shall not constitute a Detail.

     1.17  "Detailing" shall mean the act of marketing and promoting the
Products through Details.

     1.18  "Detailing Commission" shall have the meaning set forth in
Section 5.5.

     1.19  "Detailing Fee" shall have the meaning set forth in Section 5.4.

     1.20  "Dollars" means United States dollars.

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<PAGE>

                                        - 5 -


     1.21  "Effective Date" shall mean the date upon which this Agreement
becomes effective upon the fulfillment of the conditions set forth in Section
13.5.

     1.22  "FDA" shall mean the U.S. Food and Drug Administration or any
successor entity thereto.

     1.23  "FTC" shall mean:  (i) the     ***     with the chemical name:
   ***    ; (ii) any mixture of the     ***     described in Subsection 1.23(i)
and the (+) enantiomer with the chemical name:     ***     , in which the ratio
of such     ***     or greater than     ***     ; or (iii) any     ***     , and
    ***     of any of the foregoing.  FTC is exclusively licensed to Triangle by
Emory University pursuant to a License Agreement dated April 17, 1996 as amended
on May 6, 1999 (the "FTC License Agreement") for use as a pharmaceutical product
in the prevention and treatment of HIV and HBV throughout the entire world.

     1.24  "Field of Use" shall mean the prevention and treatment of HIV.

     1.25  "HIV" shall mean the human immunodeficiency virus.

     1.26  "Incremental Market Share" shall mean, with respect to each Product
during a given Sales Year or Residual Year, the positive difference, if any,
determined by the following formula:



     ***                           ***
     ***         ***               ***
     ***                           ***

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<PAGE>

                                        - 6 -


     1.27  "Initial Product Market Share" shall mean, with respect to each
Product, the market share for such product for each Physician Group, as
determined by the Co-Promotion Committee using     ***     for the     ***
immediately preceding the first Sales Year for such Product.  The Initial
Product Market Share shall be redetermined by the Co-Promotion Committee
whenever the Physician Groups are modified.

     1.28  "Launch" shall mean the date upon which the first commercial sale of
ABT-378 (as evidenced by the invoice date for such sale) occurs in the
Territory.

     1.29  "Legal Requirements" shall mean any and all federal, state and local
laws, regulations, ordinances, orders and requirements applicable to the Parties
and their Affiliates in performance of this Agreement, including without
limitation, the Securities and Exchange Act of 1934, as amended, as well as such
laws, regulations, ordinances, orders and requirements applicable to the sale,
marketing promotion, detailing, and distribution of the Product, including
without limitation, the following with the Territory:  the Prescription Drug
Marketing Act of 1987, the Federal Food, Drug and Cosmetic Act, and all
regulations and other requirements of the FDA.

     1.30  "Losses" shall mean any liabilities, costs, damages, judgments,
settlements and other reasonable out-of-pocket expenses (including legal
expenses).

     1.31  "MKC-442" shall mean the product known as MKC-442, with the chemical
name     ***     thereof.  MKC-442 is exclusively licensed to Triangle by
Mitsubishi Chemical Corporation pursuant to a License Agreement dated June 17,
1997 (the "MKC-442 License Agreement") for use as a pharmaceutical product in
the entire world, excluding Japan.

     1.32  "Net Units" shall mean, with respect to each Product, the total
number of Units of Product which are sold by Abbott in the Territory to Third
Parties during a given Sales Year or

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    Confidential Treatment and filed separately with the Commission.

<PAGE>

                                        - 7 -


Residual Year less any returned, recalled, or any other such Product for which
the customer has been credited the original sales price.

     1.33  "Norvir" shall mean the chemical compound known as ritonavir, which
is sold by Abbott as a pharmaceutical product in the United States under the
trademark Norvir-Registered Trademark- for the treatment of HIV.

     1.34  "Party" shall mean Abbott or Triangle, and "Parties" shall mean
Abbott and Triangle.

     1.35  "Person" shall mean a natural person, a corporation, a partnership,
a trust, a joint venture, any governmental authority, and any other entity or
organization.

     1.36  "     ***     " shall mean the     ***     the     ***     .

     1.37  "Primary Details" shall mean a Detail in which the Product being
Detailed is the product most emphasized, and usually the first product
presented, during such Detail.

     1.38  "Product Approval" shall mean receipt of approval from the FDA to
market a pharmaceutical product in the United States.

     1.39  "Product Market Share" shall mean, with respect to each Product for
a given Sales Year or Residual Year, the percent amount determined in accordance
with the following formula:

           ***                     ***                      ***
           ***                     ***                      ***
                                   ***


The Product Market Share shall be calculated separately for the Co-Promotion
Physician Group and the Representative Physician Group.

     1.40  "Product Patent" shall mean:  (a) any patents and patent
applications owned by or licensed to Abbott which contain claims covering the
manufacturing, use and sale of the Products

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                                        - 8 -


or the Products; and (b) all substitutions, extensions, divisionals,
continuations, continuations-in-part, renewals, supplementary protection
certificates or foreign counterparts of such patents and patent applications
identified in sub-part (a).

     1.41  "Product Technology" shall mean the technical information, data,
inventions, discoveries, trade secrets, information, data, formulas, procedures,
know-how and results which are owned by or otherwise licensed to (with the right
to sublicense) Abbott during the Term which are useful for the development,
registration, manufacture, use or sale of the Compounds or Products.

     1.42  "Products" shall mean the following pharmaceutical products within
the Field of Use:  (i) Norvir; and (ii) ABT-378 subject to the fulfillment of
the Condition.

     1.43  "Promote" or "Promotion" shall mean the act of Detailing or
otherwise advertising, marketing and promoting sales of the Products.

     1.44  "Promotional Materials" shall mean all electronic and computer
managed information (including the Internet) and all written, printed or graphic
materials, brochures, sales aids and other promotional items relating to a
Product.

     1.45  "Reasonable Best Efforts" shall mean     ***     .  Each Party shall
be entitled to exercise prudent and justified business judgment in fulfilling
its obligations to exercise its Reasonable Best Efforts under this Agreement.

     1.46  "Residual Commission" shall have the meaning set forth in Section
5.6.

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                                        - 9 -


     1.47  "Residual Period" shall mean, with respect to each Product, the
period beginning upon the expiration of the Active Detailing Period for such
Product and continuing until the     ***     of such date.

     1.48  "Residual Year" shall mean, with respect to each Product, a fiscal
period of twelve (12) consecutive calendar months with the first Residual Year
commencing on the first day of the Residual Period and the second Residual Year
commencing on the first day after the end of the first Residual Year.

     1.49  "     ***     " shall mean     ***     designated by the Parties for
each Sales Year as satisfying the following criteria:  (i) they are     ***    ;
and (ii) they have     ***     as measured by     ***     .  The     ***
shall be designated in writing by the Parties prior to the start of each Sales
Year.  For each Residual Year, the     ***     for the last Sales Year of the
Active Detailing Period.

     1.50  "Sales Quarter" shall mean, with respect to each Product, a fiscal
period of three (3) consecutive calendar months starting on the first day of the
first, fourth, seventh and tenth month of each Sales Year.

     1.51  "Sales Representative" shall mean, with respect to each Party, an
individual:  (i) who is regularly employed by such Party on a full-time or
part-time basis as a member of one of its sales forces     ***     , with the
consent of the other Party is retained on a contractual basis to act as part of
its sales force; and (ii) who is appropriately

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                                        - 10 -


qualified and experienced in pharmaceutical product promotion to make effective
sales presentations for the Products.

     1.52  "Sales Year" shall mean, with respect to each Product, a fiscal
period of twelve (12) consecutive calendar months, with the first Sales Year
commencing on the first day of the calendar month in which the Co-Promotion Date
for each Product occurs, and each successive Sales Year commencing on the first
day after the end of the previous Sales Year.

     1.53  "Sample Pack" shall mean a packaged and labeled container of Product
for distribution to Third Parties as samples.

     1.54  "Secondary Detail" shall mean a Detail in which the Product being
Detailed is not the most emphasized product, and is not the first Product
presented, during such Detail.

     1.55  "Term" shall have the meaning set forth in Section 13.1.

     1.56  "Territory" shall mean the United States of America,     ***     .

     1.57  "Third Party" shall mean any Person that is not a Party.

     1.58  "Total Product Rx Market" shall mean, with respect to each Product
during a given Sales Year or Residual Year, the total number of prescriptions of
such Product during such year which are written by each Physician Group as
reported in     ***     .  The Total Product Market shall be calculated
separately for the Co-Promotion Physician Group and the Representative Physician
Group.

     1.59  "Total Protease Inhibitor Rx Market" shall mean the total number of
protease inhibitor prescriptions for each given Sales Year or Residual Year
which are written by each Physician Group as reported in     ***     .  The
Total Protease Inhibitor Market shall be

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                                        - 11 -


calculated separately for the Co-Promotion Physician Group and the
Representative Physician Group.

     1.60  "Triangle-Abbott Alliance Agreements" shall mean this Agreement and
the following agreements between the Parties of even date herewith:  (i) the
Collaboration Agreement; (ii) the Stock Purchase Agreement; and (iii) the
Stockholder Rights Agreement.  Upon its execution and delivery, the Supply
Agreement shall also be considered one of the Triangle-Abbott Alliance
Agreements.

     1.61  "Unit" shall mean the unit dosage form of such Product (i.e., a
tablet or a capsule or a milliliter of liquid).

     1.62  "Valid Claim" shall mean (a) an issued claim of any unexpired patent
including among the Product Patents, or (b) a pending claim of any pending
patent application included among the Product Patents, which has not been held
unenforceable, unpatentable or invalid by a decision of a court or governmental
body of competent jurisdiction, unappealable or unappealed within the time
allowed for appeal, which has not been rendered unenforceable through disclaimer
or otherwise or which has not been lost through an interference proceeding.

                                      ARTICLE 2

                                     CO-PROMOTION

     2.1   CO-PROMOTION.  Subject to the terms and conditions of this
Agreement, Abbott hereby grants to Triangle, and Triangle hereby accepts, the
exclusive right to Co-Promote Norvir in the Territory jointly with Abbott during
the Active Detailing Period.  Upon the Product Approval of ABT-378 in the
Territory, Abbott shall grant to Triangle, and Triangle hereby accepts, the
exclusive right to Co-Promote ABT-378 in the Territory jointly with Abbott
during the Active Detailing Period; provided, however, that such right is    ***

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                                        - 12 -


   ***     (i)     ***     or (ii)     ***     shall not appoint any Third Party
to act on its behalf with respect to the Co-Promotion of the Products in the
Territory.

     2.2  LICENSE.  Abbott hereby grants Triangle a license in the Territory to
utilize the Product Patents and Product Technology owned by or licensed to
Abbott solely for the purpose of fulfilling Triangle's duties and obligations
under this Agreement.

                                      ARTICLE 3

                  CLINICAL DEVELOPMENT, PRODUCT APPROVAL AND LAUNCH

     3.1  CLINICAL DEVELOPMENT.  Abbott shall exercise its Reasonable Best
Efforts to pursue and shall bear the full cost and expense of the clinical
development of the ABT-378, including performing all clinical studies and trials
and generating all safety and toxicology data required to pursue Product
Approval of the Products in the Territory.  Abbott shall keep Triangle generally
apprised with respect to the status of its clinical development activities.
Abbott shall control all decisions regarding such clinical development
activities.

     3.2  PRODUCT APPROVAL.  Within the Territory, Abbott shall exercise its
Reasonable Best Efforts to maintain Product Approval of Norvir and to file,
obtain and maintain Product Approval of ABT-378, and shall bear the full cost
and expense thereof Abbott shall keep Triangle generally apprised with respect
to its regulatory activities in the Territory.  Abbott shall control all
decisions regarding its regulatory activities in the United States.

     3.3  LAUNCH.  Abbott shall use its Reasonable Best Efforts to Launch
ABT-378 in the Territory within     ***     from the date of Product Approval in
the United States.

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                                        - 13 -


     3.4  EXCUSED PERFORMANCE.  The Parties acknowledge and understand that the
development, registration and marketing of the Products, as with any
pharmaceutical product, is subject to certain inherent risks including that
(a) the Products will be ineffective, toxic, or will not receive Product
Approval; (b) the Products will be too expensive to manufacture or market or
will not achieve broad market acceptance; (c) Third Parties will hold
proprietary rights that will preclude the marketing and sale of the Product; or
(d) Third Parties will market equivalent or superior products.  Neither Party
makes any representation or warranty that the Products:  (i) will be
successfully developed; (ii) will receive all necessary Product Approvals;
(iii) will be Launched; or (iv) will be commercially successful.  The respective
obligations of the Parties under this Article and Article 4 with respect to any
Product, are expressly conditioned upon the safety, efficacy and commercial
feasibility of such Product, and a Party's obligation hereunder shall be delayed
or suspended for so long as any condition or event exists which reasonably
causes a Party to question the safety, efficacy or commercial feasibility of
either Product.  Each Party shall promptly notify the other Party in the event
any issue arises as to the safety, efficacy, commercial feasibility, or adverse
business or financial conditions with respect to either Product.

     3.5     ***    .  The Parties shall discuss in good faith the    ***    of
any     ***     with one or more other     ***     .  In the event the Parties
cannot reach agreement on the     ***     , the Parties agree to negotiate in
good faith an amendment to this Agreement to take into account any anticipated
impact on the     ***     as a result of the exclusion of such     ***     .

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                                        - 14 -


                                      ARTICLE 4

                              CO-PROMOTION AND PROMOTION

     4.1  MARKETING EFFORT.  Abbott and Triangle shall use their Reasonable Best
Efforts to Co-Promote the Products in the Territory.  The Co-Promotion Date for
Norvir shall be within     ***     from the date that Triangle notifies Abbott
that it intends to begin Co-Promoting Norvir; provided, however, in no event
shall the Co-Promotion Date be later than     ***     .  The Co-Promotion Date
for ABT-378 shall be     ***     provided that the Condition has been satisfied
by such date.  If the Condition is satisfied after     ***     ABT-378, the
Co-Promotion Date shall be within     ***     after the Condition has been
satisfied.  Abbott shall be the lead Party for implementation of, and shall make
tactical decisions with regard to, Co-Promotion of the Products in the
Territory.

     4.2  CO-PROMOTION COMMITTEE.

          (a)  Abbott and Triangle shall work together to Co-Promote the
     Products in the Territory and shall present their views on the Co-Promotion
     of each Product through a committee (the "Co-Promotion Committee") which
     shall oversee and direct the Co-Promotion of the Products in the Territory.
     The Co-Promotion Committee shall review and approve strategies for the
     advertisement, marketing, Detailing and promotion of the Products and
     Undertake the activities necessary to implement those strategies through a
     Co-Promotion Plan and Promotional Materials (including by coordinating the
     Parties' Detailing messages and methodologies, physician and call programs
     and efforts).

          (b)  The Co-Promotion Committee, consisting of a total of not more
     than     ***     , shall include an equal number of representatives from
     Abbott and Triangle and shall be permanently chaired by an Abbott
     representative.  Each Party shall

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                                        - 15 -


     have the right, at any time, to designate by written notice to the other
     Party, a replacement for any of such Party's members on the Co-Promotion
     Committee, including the chairperson.

          (c)  The Co-Promotion Committee shall endeavor to work by consensus.
     Where consensus cannot be reached, Abbott shall be responsible for making
     all decisions of the Co-Promotion Committee; provided, however, that except
     for the location of the Triangle Sales Representatives which shall be
     solely determined by Triangle and except for the selection of the Physician
     Groups, which shall be mutually agreed upon by the Parties.

          (d)  In addition to the members of the Co-Promotion Committee, it is
     understood that from time to time additional personnel having specialized
     experience and training shall be requested to assist the Co-Promotion
     Committee, including finance, legal, and regulatory affairs.  Such
     additional personnel may be added to a Co-Promotion Committee Meeting by
     invitation of the chairperson;

          (e)  The Co-Promotion Committee shall meet as necessary, but such
     committee shall meet     ***     .  The site for such meetings shall
     alternate between Durham, North Carolina, and Abbott Park, Illinois, or
     such other location agreed to by the Parties.  Meetings may take place by
     telephonic or video conference.  The chairperson shall send to the members
     of the Co-Promotion Committee a notice of and agenda for each meeting
     ***     prior to the date of such meeting.

          (f)   ***     after such meeting, the chairperson shall prepare and
     distribute, via facsimile to all members of the Co-Promotion Committee,
     draft action steps and decisions of the meeting.     ***    of the date on
     which the draft action steps and decisions were distributed, the members
     shall either note

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                                        - 16 -


     their approval or provide revisions to the draft.  Not more than five (5)
     business days after the receipt of all approvals or proposed revisions to
     the draft, the chairperson shall issue the final action steps and decisions
     of the Co-Promotion Committee.

          (g)  Each Party shall bear its own costs, including travel costs, for
     its personnel serving on the Co-Promotion Committee or attending any
     meeting of the Co-Promotion Committee.

     4.3  CO-PROMOTION BUDGET.  Abbott shall manage and control, and shall bear
the full cost and expense of, all elements of the budget for the Co-Promotion of
the Products (the "Co-Promotion Budget"), including an amount of Discretionary
Funds of     ***     Dollars ($  ***  ) per Sales Year and    ***    .  The
Co-Promotion Budget shall not cover the compensation or operating cost of the
Triangle Sales Representatives (including base salary, incentives and benefits),
the costs of training the Triangle Sales Representatives; provided, however,
that the foregoing shall not limit Abbott's obligation to make the payments
required by Article 5.

     4.4  CO-PROMOTION PLAN.  The Co-Promotion Committee shall develop and
oversee the implementation of an annual plan (the "Co-Promotion Plan") for the
Co-Promotion of the Products in the Territory; provided that Abbott shall be
responsible for making all final decisions relating to the implementation of the
Co-Promotion Plan, and further provided that unless expressly agreed otherwise
by the Parties, the Abbott Sales Representatives and the Triangle Sales
Representatives shall be treated in a like and equal manner such that:  (i)  ***
well as the    ***    ; and (ii)    ***

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                                        - 17 -


   ***    .  In preparing the Co-Promotion Plan, the Co-Promotion Committee
shall use its Reasonable Best Efforts to coordinate its activities with the U.S.
Marketing Board (as defined in the Collaboration Agreement) with respect to its
preparation of the U.S. Co-Promotion Plan (as defined in the Collaboration
Agreement).

     4.5  SALES REPRESENTATIVES.  Each Party shall be responsible for staffing,
selling skills training, supervising, and compensating (including incentives)
its own Sales Representatives.  With respect to training, Abbott shall make
available to Triangle, at no charge, the same kinds and amounts of
Product-specific training materials that it provides for its own Sales
Representatives.  Both Parties shall re-train their personnel in the promotion
of the Products from time to time as set forth in the Co-Promotion Plan.  Each
Party shall reward its Sales Representatives (    ***    ) for promoting the
Products through an incentive-based compensation system.  For Abbott such system
shall be     ***    .  For Triangle, its system shall be     ***    .  Each
Party shall have full control over, and shall bear the full cost of, the salary,
incentives, benefits and other employment matters related to its Sales
Representatives.  Triangle shall not have more than     ***     Detailing the
Products.

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                                        - 18 -


     4.6  CO-PROMOTION EFFORT.  Each Party shall use its Reasonable Best Efforts
to perform those tasks and responsibilities assigned to such Party in the
Co-Promotion Plan, and each Party shall use its Reasonable Best Efforts to
support the Co-Promotion of the Products in the Territory.  Each Party may
perform Details throughout the Territory.  The Co-Promotion Committee shall
coordinate the Parties' Detailing activities so as to eliminate unnecessary
duplication.  In connection with the Co-Promotion of the Products in the
Territory, both Parties shall participate in conventions, and continuing
educational programs for health care professionals and the effort of the Parties
in this regard shall be coordinated by the Co-Promotion Committee.

     4.7  SAMPLING.  As part of the Co-Promotion of the Products in the
Territory, each Party may distribute Sample Packs free of charge to health care
professionals on an ongoing basis in accordance with the sampling program as
outlined in by the Co-Promotion Plan and all Legal Requirements.  Each Party
shall maintain all records required pursuant to the Prescription Drug Marketing
Act of 1987, including maintenance of written requests and delivery receipts for
any Sample Packs delivered to its sales force for so long as required by such
Act.  Triangle shall promptly report to Abbott any thefts of Sample Packs or any
losses of Sample Packs.  Abbott shall be responsible for and shall bear the full
cost of providing to both sales forces the quantities of Sample Packs set forth
in the Co-Promotion Plan.

     4.8  PROMOTIONAL MATERIALS.  Abbott shall prepare and provide the quantity
and types of Promotional Material set forth in the Co-Promotion Plan.  The
Parties shall disseminate in the Territory only those promotional and
advertising materials which have been approved for use by the Co-Promotion
Committee.  All such materials shall be consistent with the Co-Promotion Plan
approved by the Co-Promotion Committee.  Triangle shall not be required to use
Promotional

<PAGE>

                                        - 19 -


Materials which are prohibited under applicable FDA regulations.  Abbott and
Triangle shall use the same Promotional Materials in connection with the
Co-Promotion of the Products.

     4.9   PROGRAMS.  In addition to the Co-Promotion activities covered under
this Agreement, Abbott may establish and operate an indigent program for
distribution of Products and/or Sample Packs to needy individuals and/or the
physicians and other providers serving such needy individuals and an expanded
access program.

     4.10  PRICING.  *** all prices and pricing strategies relating to the
Products in the Territory.

     4.11  COMPLIANCE WITH LAW.  Each Party shall cause its sales force, and
all other employees and approved agents and representatives, to comply with all
applicable laws, regulations and guidelines in connection with the Co-Promotion
of the Products in the Territory, including, without limitation, the
Prescription Drug Marketing Act and the Federal Anti-Kickback Statute.  Each
Party shall cause its sales force, in the course of its Co-Promotion of the
Products, to (i) limit its claims of efficacy and safety for Products to those
which are consistent with the Co-Promotion Committee's then approved product
circular for the Products or as otherwise approved by the Co-Promotion Committee
consistent with Legal Requirements; (ii) not delete or modify claims of efficacy
and safety in the Co-Promotion of Products so that they are different in any way
from those which are contained in the Co-Promotion Committee's then approved
product circular for the Products, or make any changes in promotional materials
and literature provided by the Co-Promotion Committee; and (iii) not knowingly
or recklessly do anything which will jeopardize the goodwill or reputation of
the Products or the other Party.  In addition, each Party shall exercise its
Reasonable Best Efforts to conduct the Co-Promotion of the Products in adherence
to the American Medical Association Gifts to Physicians From Industry
Guidelines.

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                                        - 20 -


                                      ARTICLE 5

                               REPORTS AND COMMISSIONS

     5.1   REPORTS BY TRIANGLE.  Within     ***     after the end of each Sales
Quarter after the Parties begin Co-Promoting Norvir in the Territory, Triangle
shall deliver to Abbott a true and accurate written report showing for such
Sales Quarter a report in electronic format showing the number of Details
performed by Triangle in the Territory by Triangle product Detail codes, and by
Physician (including the Physician name and address, AMA Educational Number and
AMA specialty) during such Sales Quarter and such Sales Year to date, the date
of such presentation and a flag indicating whether such presentation was a
Primary Detail or a Secondary Detail.

     5.2  REPORTS BY ABBOTT.  Within     ***     after the end of each Sales
Quarter, Abbott shall deliver to Triangle a true and accurate written report
showing the Detailing Fee due to Triangle for such Sales Quarter.  Within
     ***  after the end of each Sales Year and each Residual Year, Abbott shall
deliver to Triangle a true and accurate written report showing for such Sales
Year or Residual Year:

          (a)  ***

          (b)  ***

          (c)  ***

          (d)  ***

          (e)  ***

          (f)  ***

          (g)  ***

          (h)  ***

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                                        - 21 -


Any Detailing Fee and any portion of the Detailing Payment that exceeds the
Detailing Fees paid to Triangle for such Sales Year shall be paid to Triangle at
the time that the report for such payment is due.

     5.3  CERTIFICATIONS.  The Chief Financial Officer and/or Treasurer of
Triangle shall certify in writing the correctness and completeness of each
report submitted by Triangle pursuant to Section 5.1.  The Divisional Vice
President, Controller for the Pharmaceutical Products Division of Abbott shall
certify in writing the correctness and completeness of each report submitted by
Abbott pursuant to Section 5.2.

     5.4  DETAILING FEE.  Abbott shall pay Triangle an amount equal to:  (i)
***    ($ *** ) or each Primary Detail conducted by Triangle during the Active
Detailing Period; and (ii)    ***    ($ *** ) for each Secondary Detail
conducted by Triangle during the Active Detail Period (the "Detailing Fee");
provided, however, in no event shall the Detailing Fee paid for each Product
during any Sales Quarter during the Active Detailing Period exceed (i)    ***
Dollars ($ *** ) if Triangle has    ***    or more Sales Representatives
Detailing the Products or (ii)    ***    Dollars ($ *** ) if Triangle has less
than     ***     Sales Representatives Detailing the Products.

     5.5  DETAILING COMMISSION.  At the end of each Sales Year during the Active
Detailing Period, Abbott shall pay a detailing commission (the "Detailing
Commission") to Triangle for each Product determined as follows:

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                                        - 22 -



     ***                 ***                 ***                 ***
     ***                 ***                 ***                 ***
     ***                 ***                 ***                 ***
     ***                                                         ***
     ***

It being understood by the Parties that if the Incremental Market Share for a
Product during any Sales Year is not a positive number then no Detailing
Commission shall be due and payable to Triangle with respect to such Product and
such Sales Year.

     5.6   DETAILING PAYMENT.  The Detailing Payment for each Sales Year for
each Product shall be the     ***     (i) the     ***    (ii)     ***     .

     5.7  RESIDUAL COMMISSION.  At the end of each Residual Year during the
Residual Period, Abbott shall pay a residual commission (the "Residual
Commission") to Triangle for each Product determined as follows:

     ***                 ***                 ***                 ***
     ***                 ***                 ***                 ***
     ***                 ***                 ***                 ***
     ***                                                         ***
     ***

It being understood by the Parties that if the Incremental Market Share for any
Product during any Residual Year is not a positive number, then no Residual
Commission shall be due and payable to Triangle with respect to such Product for
such Residual Year; provided, however, that the Residual Commission shall never
 ***    , if any, for the last Sales Year in the Active Detailing Period for
such Product.

     5.8   EXAMPLES.  Exhibit 5.8 sets forth various examples of the
calculations of the Detailing Payment required by this Article 5.

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                                        - 23 -


The Residual Commission shall never    ***    , if any, for the last Sales Year
in the Active Detailing Period for such Product.

     5.8   EXAMPLES.  Exhibit 5.8 sets forth various examples of the
calculations of the Detailing Payment required by this Article 5.

                                      ARTICLE 6

                                  METHOD OF PAYMENTS

     6.1   PAYMENT PROCEDURE.  All payments due under this Agreement shall be
paid in Dollars by wire transfer or by such other means agreed upon by the
Parties, in each case at the expense of the payor, for value no later than the
due date thereof (with twenty four [24] hours advance notice of each wire
transfer) to the following bank accounts or such other bank accounts as the
payee shall designate in writing within a reasonable period of time prior to
such due date:

           If to Abbott:

           Account Name:      Abbott Laboratories
           Account Number:         ***
           Bank:                   ***
                                   ***

           ABA Number:             ***



           If to Triangle:

           Account Name:      Triangle Pharmaceuticals, Inc.
           Account Number:         ***
           Bank:                   ***
           Reference:              ***
           ABA Number:             ***


     6.2   INTEREST CHARGE.  Without limiting either Party's rights to pursue
any other remedies at law or in equity, if any Party underpays or otherwise
fails to pay any payment required

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                                        - 24 -


under this Agreement within   ***  of the due date thereof, then such other
Party shall pay     ***     .

     6.3   TAXES.  Where any sum due to be paid to either Party hereunder is
subject to any withholding or similar tax, the Parties shall use their best
efforts to do all such acts and things and to sign all such documents as will
enable them to take advantage of any applicable double taxation agreement or
treaty.  In the event there is no applicable double taxation agreement or
treaty, or if an applicable double taxation agreement or treaty reduces but does
not eliminate such withholding or similar tax, the payor shall pay such
withholding or similar tax to the appropriate government authority, deduct the
amount paid from the amount due the payee and secure and send to the payor the
best available evidence of such payment.

     6.4   BOOKS AND RECORDS.  Each Party shall keep full, true and accurate
books of account and records containing all particulars and reasonable
supporting documentation as may be necessary for the purpose of (i) determining
the payments required by Article 6 and such Party's compliance in other respects
with its obligations under this Agreement, including the number and types of
Details performed by each Party in the Territory.  All such books of account,
records and supporting documentation shall be located at the principal place of
business of each Party and shall be open for inspection at a time mutually
acceptable to the Parties, during normal business hours no more frequently than
***    following the end of each calendar year to which they apply by any
independent certified public accountant retained by the other Party (reasonably
acceptable to the Party to be audited) on behalf of such other Party for the
purpose of verifying the audited Party's reports and/or compliance in other
respects with obligations under this Agreement.  If such audit discloses an
underpayment or overpayment, the

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                                        - 25 -


audited Party shall promptly pay to the other Party the amount of such
underpayment or refund the amount of any overpayment, as the case may be, as
well as its reasonable cost of such audit after the receipt of a bill or invoice
for such audit provided that the amount of the underpayment is     ***     or
more of the amount actually due.

     6.5   THIRD PARTY INFRINGEMENT.  If Abbott or Triangle become aware of any
activity that such Party believes infringes a Valid Claim of a Product Patent,
such Party shall promptly notify the other Party of all relevant facts and
circumstances pertaining to the potential infringement.    ***    to enforce any
rights within the Product Patents against such infringement, at    ***    ,
shall reasonably cooperate    ***    in such effort, including being joined as a
party to such action if necessary.  Any damage award or settlement in excess of
the cost and expense of prosecuting such infringement action shall be     ***
in which such infringement existed.

                                      ARTICLE 7

                 ADVERSE EVENTS, RECALLS AND OTHER REGULATORY MATTERS

     7.1   ADVERSE REACTION REPORTING.  Triangle shall keep Abbott informed of
information in or coming into its possession or control concerning side effects,
injury, toxicity or sensitivity reaction and incidents of severity thereof
associated with commercial and clinical uses, studies, investigations or tests
of each Product in the Territory, whether or not determined to be attributable
to the Product.  Abbott shall be responsible for filing with the FDA, as
required, any adverse reaction report it receives.

     7.2   PRODUCT INFORMATION REQUESTS.  Information concerning any
complaints, medical inquiries and/or drug information requests from consumers,
physicians or other Third Parties

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                                        - 26 -


received by Triangle regarding a Product in the Territory shall be forwarded to
Abbott's Pharmacovigilence Department within    ***    of Triangle's receipt of
the request.  Abbott's Pharmacovigilence Department shall respond to such
complaints, inquiries and requests, if necessary, in accordance with such
Department's usual and customary procedures.  Abbott shall supply Triangle, for
Triangle's information purposes only, with copies of its standard response
information for the Products as well as any updates thereto.

     7.3   GOVERNMENT REPORTS.  Abbott shall be responsible for filing with the
FDA any adverse reaction reports that it receives directly from Third Parties
and from Triangle in the Territory.

     7.4   PRODUCT RECALL.  In the event that either Party determines that an
event, incident or circumstance has occurred which may result in the need for a
recall or other removal of any Product, or any lot or lots thereof, from the
market, such Party shall advise the other and the Parties shall consult with
respect thereto.  Abbott shall have the sole authority to decide whether a
recall or other removal of such Product shall be made in the Territory.  Except
as provided below, if a Product (or any lot or lots thereof) is recalled or
otherwise removed from the market, Abbott shall bear all costs and expenses of
such recall or removal, including, without limitation, expenses and other costs
or obligations to Third Parties, the cost and expense of notifying customers and
the costs and expenses associated with shipment of the recalled Product and the
cost and expense of destroying the Product removed from the market, if
necessary.  Any such recall or removal costs, expenses or obligations shall be
borne by Triangle only to the extent that the recall or removal results from
Triangle's:  (i) improper sampling practices or mishandling of Sample Packs;
(ii) Co-Promotion of the Product in a manner inconsistent with the Product's
labeling; or (iii) violation of this Agreement.  In the event of a recall, each
Party shall promptly meet and

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                                        - 27 -


discuss in good faith whether the Parties' Detailing obligations should be
reduced or redirected to another Product.

     7.5   PROCEDURES.    ***    after the Effective Date, representatives of
each Party shall meet to establish procedures to accomplish the obligations set
forth in Sections 7.1, 7.2, 7.3, 7.4 and 7.6.

     7.6   GOVERNMENTAL CONTACT REPORTING.  Triangle shall promptly notify
Abbott upon being contacted by the FDA or any other federal, state or local
governmental agency in the Territory for any regulatory purpose pertaining to
this Agreement or to the Products.  Triangle shall not respond to the FDA or
such governmental agency before consulting with Abbott, unless under the
circumstances pursuant to which FDA or such other federal, state or local
governmental agency contacts Triangle, it is not practical or lawful for
Triangle to give Abbott advance notice, in which event Triangle shall inform
Abbott of such contact as soon as practical and lawful.  In addition, each Party
shall keep the other Party advised with respect to information concerning the
safety or efficacy of the Products.  On Triangle's written request with respect
to any Product, Abbott shall supply detailed information regarding such safety,
efficacy and medical information issues, including, if requested, copies of
safety reports filed with the FDA or any other governmental agency.

                                      ARTICLE 8

                            REPRESENTATIONS AND WARRANTIES

     8.1   ABBOTT REPRESENTATIONS AND WARRANTIES.  Abbott hereby represents and
warrants to Triangle as follows:

          (a)    Abbott is a corporation duly organized and validly existing in
     good standing under the laws of its state of incorporation, with all
     requisite corporate power

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                                        - 28 -


     and authority to own, lease and operate its properties and assets and to
     carry on its business as presently conducted and as proposed to be
     conducted;

          (b)    Abbott has all requisite corporate right, power and authority
     to enter into this and to consummate the transactions contemplated hereby.
     The execution and delivery of this Agreement and the consummation by Abbott
     of the transactions contemplated hereby have been duly authorized by all
     necessary corporate action on its behalf This Agreement constitutes a
     legal, valid and binding obligation of Abbott, enforceable against Abbott
     in accordance with the terms hereof;

          (c)    subject to compliance with the HSR Act and such filings as may
     be required pursuant to federal and state securities laws, the execution,
     delivery and performance by Abbott of this Agreement and Abbott's
     compliance with the terms and provisions hereof will not result in any
     violation of, or default under (with or without notice or lapse of time, or
     both), or give rise to a right of termination, cancellation or acceleration
     of any obligation pursuant to, or a loss of benefits under, any provision
     of Abbott's Articles of Incorporation or By-laws, or any mortgage,
     indenture, lease or other agreement or instrument, license, judgment,
     order, decree, statute, law, ordinance, rule or regulation applicable to
     Abbott, its properties or assets;

          (d)    no consent, approval or authorization of, or designation,
     declaration or filing with any governmental authority is required in
     connection with the valid execution, delivery or performance of this
     Agreement or the consummation of the transactions contemplated hereby,
     except the filing of such forms with the United States Department of
     Justice and the Federal Trade Commission as shall be required by the HSR
     Act and the expiration or termination of any waiting periods thereunder and
     such filings, as may be

<PAGE>

                                        - 29 -


     required to be made with the SEC, any national securities exchange and any
     state securities commission; and

     (e)   (i) to the best of Abbott's knowledge and information, there are no
     patents, trademarks, licenses, sublicenses or other proprietary rights
     which are valid and which would be infringed by making, having made, using,
     selling, offering for sale or importing Products in the Territory in
     accordance with the terms of this Agreement;

           (ii)  at no time prior to the termination of the last to terminate
     of this Agreement shall Abbott enter into any transaction providing for
     debt financing which would:  (A) result in the imposition of a lien,
     license, security interest or other encumbrance upon or transfer of any of
     the Product Patents or the Product Technology; or (B) prohibit or
     materially impair Abbott from fulfilling its obligations under this
     Agreement; and

           (iii) Abbott is not, and as a result of the execution and delivery
     of this Agreement or the performance by Abbott hereunder, and Abbott will
     not be in violation of or lose any rights to any Product Patents or Product
     Technology (including, without limitation, pursuant to any license,
     sublicense or other agreement to which Abbott is a party or is otherwise
     bound);

          (f)    Abbott is not aware of any material facts which it has not
     disclosed to Triangle regarding the manufacture, use or sale of any Product
     or the practice of any inventions included in the Product Patents or the
     use of the Product Technology by Triangle, including without limitation any
     material facts regarding the possibility that such

<PAGE>

                                        - 30 -


     manufacture, use, sale or practice might infringe any Third Party's
     know-how, patent rights or other intellectual property in the Territory;

          (g)    Abbott is aware of no Third Party using or infringing all or
     any of the Product Patents in derogation of the rights granted pursuant to
     this Agreement;

          (h)    Abbott is aware of no Third Party claim to any rights in the
     Product Patents or the Product Technology with respect to the Product; and

          (i)    Abbott is aware of no pending interference or opposition
     proceeding or litigation or any communication which threatens an
     interference or opposition proceeding or litigation before any patent and
     trademark office, court, or any other governmental entity or court in any
     jurisdiction in regard to the Product Patents; and

     8.2   TRIANGLE REPRESENTATIONS AND WARRANTIES.  Triangle hereby represents
and warrants to Abbott as follows:

          (a)    Triangle is a corporation duly organized and validly existing
     in good standing under the laws of its state of incorporation, with all
     requisite corporate power and authority to own, lease and operate its
     properties and assets and to carry on its business as presently conducted
     and as proposed to be conducted;

          (b)    Triangle has all requisite corporate right, power and
     authority to enter into this Agreement and to consummate the transactions
     contemplated hereby.  The execution and delivery of this Agreement and the
     consummation by Triangle of the transactions contemplated hereby have been
     duly authorized by all necessary corporate action on its behalf.  This
     Agreement constitutes a legal, valid and binding obligation of Triangle,
     enforceable against Triangle in accordance with the terms hereof;

<PAGE>

                                        - 31 -


          (c)    subject to compliance with the HSR Act and such filings as may
     be required pursuant to federal and state securities laws, the execution,
     delivery and performance by Triangle of this Agreement and Triangle's
     compliance with the terms and provisions hereof will not result in any
     violation of, or default under (with or without notice or lapse of time, or
     both), or give rise to a right of termination, cancellation or acceleration
     of any obligation pursuant to, or a loss of benefits under, any provision
     of Triangle's Certificate of Incorporation or By-laws, or any mortgage,
     indenture, lease or other agreement or instrument, license, judgment,
     order, decree, statute, law, ordinance, rule or regulation applicable to
     Triangle, its properties or assets; and

          (d)    no consent, approval or authorization of, or designation,
     declaration or filing with any governmental authority is required in
     connection with the valid execution, delivery or performance of this
     Agreement or the consummation of the transactions contemplated hereby
     except the filing of such forms with the United States Department of
     Justice and the Federal Trade Commission as shall be required by the HSR
     Act and the expiration or termination of any waiting periods thereunder and
     such filings, as may be required to be made with the SEC, the NASD, any
     national securities exchange and any state securities commission.

     8.3   NO OTHER WARRANTIES.  EXCEPT AS OTHERWISE EXPRESSLY PROVIDED IN THIS
AGREEMENT, EACH PARTY MAKES NO OTHER WARRANTIES OR REPRESENTATIONS, INCLUDING
FITNESS FOR PURPOSE INTENDED OR MERCHANTABILITY, WHETHER EXPRESS OR IMPLIED.

<PAGE>

                                        - 32 -


                                      ARTICLE 9

                               LIMITATION ON LIABILITY

EXCEPT AS OTHERWISE PROVIDED, NEITHER PARTY SHALL BE LIABLE FOR ANY SPECIAL,
INCIDENTAL, INDIRECT OR CONSEQUENTIAL LOSSES ARISING OUT OF OR RELATING TO THIS
AGREEMENT; PROVIDED HOWEVER, THIS LIMITATION SHALL NOT APPLY TO LOSSES ARISING
FROM THIRD PARTY CLAIMS FOR WHICH A PARTY IS INDEMNIFIED UNDER THE TERMS OF THIS
AGREEMENT.

                                      ARTICLE 10

                          CONFIDENTIALITY AND NONDISCLOSURE

     10.1  CONFIDENTIALITY OBLIGATION.  Each of Abbott and Triangle (the
"Receiving Party") shall keep strictly confidential any information disclosed in
writing, orally, visually or in any other manner by the other Party
(the "Disclosing Party") or otherwise made available to the Receiving Party
which the Disclosing Party considers to be and treats as proprietary or
confidential ("Confidential Information").  Without limiting the generality of
the foregoing, all proprietary information concerning the Disclosing Party's
business, operations, suppliers, products, product manufacture, sale, marketing
or distribution, trade secrets and intellectual property shall be considered
Confidential Information.  Any data or other information relating to or
resulting from the clinical trials of the Products shall be deemed to be
Confidential Information of Abbott.  The Disclosing Party shall use commercially
reasonable efforts to designate any written Confidential Information disclosed
to the other Party as Confidential Information by prominently marking it
"confidential," "proprietary" or the like.  "Confidential Information" shall not
include information:

          (a)    which is or becomes generally available to the public other
     than as a result of disclosure thereof by the Receiving Party;

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                                        - 33 -


          (b)    which is lawfully received by the Receiving Party on a
     nonconfidential basis from a Third Party that is not itself under any
     obligation of confidentiality or nondisclosure to the Disclosing Party or
     any other Person with respect to such information;

          (c)    which by written evidence can be shown by the Receiving Party
     to have been independently developed by or for the Receiving Party; or

          (d)    which the Receiving Party establishes by competent proof was
     in its possession at the time of disclosure by the other Party and was not
     acquired, directly or indirectly from the other Party.

     10.2  NONDISCLOSURE OF CONFIDENTIAL INFORMATION.  The Receiving Party
shall use Confidential Information solely for the purposes of this Agreement and
shall not disclose or disseminate any Confidential Information to any Third
Party at any time without the Disclosing Party's prior written consent, except
for disclosure to those of its directors, officers, employees, accountants,
attorneys, advisers and agents whose duties reasonably require them to have
access to such Confidential Information, provided that such directors, officers,
employees, accountants, attorneys, advisers, agents are required to use the
Confidential Information solely for purposes of this Agreement and maintain the
confidentiality of such Confidential Information to the same extent as if they
were Parties hereto.

     10.3  EXCEPTION.  The foregoing confidentiality and nondisclosure
obligations shall not apply to information which is required to be disclosed by
law or by regulation; provided, that (i) the Receiving Party gives the
Disclosing Party reasonable notice of the disclosure; (ii) the Receiving Party
uses reasonable efforts to resist disclosing the Confidential Information;
(iii) the Receiving Party cooperates with the Disclosing Party on request to
obtain a protective order or otherwise limit the disclosure; and (iv) as soon as
reasonably possible, the Receiving Party shall

<PAGE>

                                        - 34 -


provide a letter from its counsel to the Disclosing Party confirming that the
Confidential Information is, in fact, required to be disclosed.

     10.4  INJUNCTIVE RELIEF.  The Parties acknowledge that either Party's
breach of this Article 10 may cause the other Party irreparable injury for which
it would not have an adequate remedy at law.  In the event of a breach, the
non-breaching Party shall be entitled to injunctive relief in addition to any
other remedies it may have at law or in equity.

     10.5  SCIENTIFIC AND OTHER PUBLICATIONS.  Notwithstanding anything herein
to the contrary, it is the understanding of each Party that scientific,
scholarly and other related publications or presentations concerning the
development of the Compounds and the Products, including their pre-clinical and
clinical development, shall emanate solely from Abbott and the trials and
studies sponsored by Abbott and that, as against Triangle, Abbott shall have
full control over the preparation, review and approval of such publications and
presentations, which publications and presentations shall not be restricted
hereunder; provided that, with respect to any studies done with Abbott Products
which include Triangle products, any resulting publication or presentation of
data therefrom shall be jointly reviewed and approved by Triangle and Abbott.

     10.6  SURVIVAL.  The confidentiality and nondisclosure obligations of this
Article 10 shall survive the expiration or termination of this Agreement and
remain in effect for a period of    ***    following the expiration or
termination of this Agreement.

                                      ARTICLE 11

                                INTELLECTUAL PROPERTY

     11.1  ABBOTT TRADEMARKS.  Abbott shall be solely responsible, and shall
bear the full cost and expense, for the selection, filing, registering and
maintaining of the trademark for each Product in the Territory (the "Abbott
Trademarks").  Abbott shall keep Triangle generally

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                                        - 35 -


apprised with respect to its trademark activities, and Abbott shall control all
final decisions regarding its trademark activities.

     11.2  GRANT TO TRIANGLE.  Abbott hereby grants to Triangle a nonexclusive
limited license to use Abbott's name and logo and the Abbott Trademarks solely
for the purpose of promoting distributing and selling each Product in the
Territory in accordance with the terms and conditions of this Agreement.  Abbott
shall promote the Products in the Territory only under the Abbott Trademarks.

     11.3  USE OF TRADE NAMES AND TRADEMARKS.  Triangle recognizes that the
name and logo of Abbott and the Abbott Trademarks represents a valuable asset of
Abbott and that substantial recognition and goodwill are associated with
Abbott's name and logo and the Abbott Trademarks.  Triangle hereby agrees that,
without prior written authorization of Abbott, it shall not use the name and
logo of Abbott or the Abbott Trademarks for any purpose other than the
promotion, distribution and sale of the Products solely to the extent required
to fulfill its obligations under this Agreement.  In addition, Triangle shall
only use the Abbott name and logo and the Abbott Trademarks in the form, manner
and logotype approved in writing by Abbott.  Except for the limited licenses
granted in Section 11.2, nothing in this Agreement shall be construed as an
assignment by Abbott to Triangle of any right, title or interest in or to the
Abbott name or logo or the Abbott Trademarks; it being understood that all
right, title and interest (including the goodwill associated therewith) in and
to the Abbott name and logo and the Abbott Trademarks is expressly reserved by
Abbott.

     11.4  QUALITY MAINTENANCE.  Triangle agrees to cooperate with Abbott in
facilitating Abbott's quality assurance responsibilities by permitting
reasonable inspection of Triangle's operations as they pertain to the Abbott
Trademarks and supplying Abbott with specimens of use

<PAGE>

                                        - 36 -


of such trademarks upon reasonable request, but in any case no more often than
***    calendar year.

     11.5  INJUNCTIVE RELIEF.  Triangle acknowledges that a violation of this
Article 11 would cause irreparable harm to Abbott for which no adequate remedy
at law exists, and Triangle therefore agrees that, in addition to any other
remedies available, and notwithstanding any other provision in this Agreement,
Abbott shall be entitled to injunctive relief to enforce the terms of this
Article 11.  If Abbott prevails in any such action, it shall be entitled to
recover all costs and expenses, including reasonable attorney's fees incurred
because of any legal action arising in relation to this Article 11.

     11.5  NOTIFICATION OF INFRINGEMENT AND ENFORCEMENT.  Each Party shall
notify Abbott of any infringement or misuse of Abbott's Trademarks of which such
Party becomes aware.  Abbott shall be solely responsible to prosecute any
infringement of the Abbott Trademarks.  Any damage award or settlement, in
excess of Abbott's cost and expenses of enforcement, shall be added to Abbott
Net Sales for such Sales Year.

                                      ARTICLE 12

                                   INDEMNIFICATION

     12.1  INDEMNIFICATION.

          (a)    INDEMNIFICATION BY ABBOTT.  Except as may be otherwise
provided herein, Abbott shall defend, indemnify and hold Triangle, all of its
directors, officers and employees, and Triangle Sales Representatives
(collectively the "Triangle Indemnitees") harmless from and against all Losses
incurred in connection with any Third Party suits, claims or causes of action
arising out of or resulting from:

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                                        - 37 -


          (i)    Abbott's breach of any representation, warranty, covenant, or
     other obligation provided for in this Agreement;

          (ii)   An infringement claim arising from Triangle's use of the
     Abbott name or logo or the Abbott Trademarks in connection with the
     promotion or sale of the Products, provided Triangle's use is in compliance
     with the terms of this Agreement;

          (iii)  The manufacture, promotion, marketing, sale or use of the
Products;

          (iv)   The negligence, recklessness or willful misconduct of Abbott
     and its directors, officers or employees or Abbott Sales Representatives,
     ***    , its directors, officers or employees, or Abbott Sales
     Representatives;

          (v)    Any patent infringement claim arising from the use or sale of
     a Product.

Provided, however, that Abbott shall not be required to indemnify the Triangle
Indemnitees to the extent that any Losses arise out of or result from:  (1) the
negligence, recklessness or willful misconduct of any of the Triangle
Indemnitees, including, but not limited to, out-of-label promotion of the
Products; and or (2) any breach by Triangle of this Agreement.  Triangle shall
not be considered negligent for purposes of this Section 12.1 if such claim
arises with respect to the content of the Promotional Materials, Product
labeling or other materials provided to Triangle by Abbott as long as Triangle
has distributed or employed such Promotional Materials or other such materials
as directed herein.

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                                        - 38 -


     (b)  INDEMNIFICATION BY TRIANGLE.  Except as may be otherwise provided
herein, Triangle shall defend, indemnify and hold Abbott, its directors,
officers and employees, and Abbott Sales Representatives (collectively the
"Abbott Indemnitees") harmless from and against all Losses incurred in
connection with any Third Party suits, claims or causes of action arising out of
or resulting from:

          (i)    Triangle's breach of any representation, warranty, covenant,
     or other obligation provided for in this Agreement; or

          (ii)   The negligence, recklessness or willful misconduct of
     Triangle, its directors, officers or employees or Triangle Sales
     Representatives,      ***    , their directors, officers or employees, or
     Triangle Sales Representatives; provided, however, that Triangle shall not
     be required to indemnify the Abbott Indemnitees to the extent that any
     Losses arise out of or result from:  (1) the negligence, recklessness or
     willful misconduct of any Abbott Indemnitee including, but not limited to,
     out-of label promotion of the Products; and/or (2) any breach by Abbott of
     this Agreement.

     12.2  INDEMNIFICATION PROCEDURE.  Any Abbott Indemnitee or Triangle
Indemnitee, as the case may be, shall notify Abbott or Triangle (the
"Indemnifying Party") promptly in writing of an indemnifiable claim or cause of
action under Section 12.1(a) or 12.1(b) upon receiving notice or being informed
of the existence thereof.  The Indemnifying Party shall assume, at its cost and
expense, the sole defense of such claim or cause of action through counsel
selected by the Indemnifying Party and reasonably acceptable to the other Party.
The Indemnifying Party shall diligently defend such claim or cause of action on
a timely basis, including any decision as to

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                                        - 39 -


settlement; provided that, in the event that the Indemnifying Party does not
maintain control of such defense on a timely basis, then, without prejudice to
any other rights and remedies available to the other Party under this Agreement,
the other Party may take over such defense with counsel of its choosing at the
Indemnifying Party's cost and expense.  The other Party may, at its option and
expense, participate in the Indemnifying Party's defense, and if the other Party
so participates, the Parties shall cooperate with one another in such defense.
The Indemnifying Party shall bear the total costs of any court award or
settlement of such claim or cause of action and all other costs, fees and
expenses related to the resolution thereof (including reasonable attorneys' fees
except for attorneys' fees for which the other Party is responsible in the event
that the other Party participates in the Indemnifying Party's defense of such
claim or cause of action).  The indemnification obligations herein shall apply
on a first dollar basis without limitation or reduction due to any deductible or
self-insured retention which Triangle or Abbott respectively may have under
their respective insurance coverage.

                                      ARTICLE 13

                                 TERM AND TERMINATION

     13.1  TERM.  This Agreement shall commence on the Effective Date and shall
continue, unless terminated sooner in accordance with this Article 13, for the
Active Detailing Period for each Product (the "Term"); provided, the Parties can
extend the term upon mutual agreement.

     13.2  TERMINATION NOTICE.  Triangle may terminate this Agreement at any
time upon    ***    written notice to Abbott.  Upon any such termination, ***  .

     13.3  TERMINATION FOR MATERIAL BREACH.  It is the Parties' express intent
that consideration shall first and foremost be given to remedying any breach of
this Agreement through

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                                        - 40 -


the payment of monetary damages or such other legal or equitable remedies as
shall be appropriate under the circumstances and that there shall only be a
limited right to terminate this Agreement under the following circumstances as a
matter of last resort.  In the event that the Neutral, in accordance with the
procedures set forth in Section 19.3, has rendered a ruling that a Party has
materially breached this Agreement, which ruling specified the remedies imposed
on such breaching Party for such breach (the "Adverse Ruling"), and the
breaching Party has failed to comply with the terms of the Adverse Ruling within
the time period specified therein for compliance, or if such compliance cannot
be fully achieved by such date, the breaching Party has failed to commence
compliance and/or has failed to use diligent efforts to achieve full compliance
as soon thereafter as is reasonably possible, then the non-breaching Party shall
have the following rights:

          (a)    where Triangle is the breaching Party that failed to comply
     with the Adverse Ruling and where the basis for such breach is Triangle's
     failure to abide by a material obligation under this Agreement, Abbott may
     terminate this Agreement and/or Triangle's license rights hereunder by
     delivering written notice to Triangle after the expiration of the period to
     comply;

          (b)    where Abbott is the breaching party that failed to comply with
     the Adverse Ruling and where the basis for such breach is Abbott's failure
     to abide by a material obligation under this Agreement, Triangle may
     terminate this Agreement by delivering written notice to Abbott after the
     expiration of the period to comply.

     13.4  SURVIVAL.  All rights granted and obligations undertaken by the
Parties hereunder shall terminate immediately upon the event of any termination
or expiration of this Agreement, except for the following which shall survive
according to their terms:

<PAGE>

                                        - 41 -



          (a)    The obligation of each Party to pay to the other Party any and
     all payments accrued under this Agreement prior to such termination or
     expiration;

          (b)    The provisions of Section 5.6 (Residual Commission), which
     shall survive for    ***    after the expiration or termination of this
     Agreement, unless this Agreement is terminated pursuant to Section 13.2 or
     Section 13.3 due to a material breach by Triangle or pursuant to Section
     13.6;

          (c)    The provisions of Sections 5.1 and 5.2, which shall survive
     with respect to any reports required after the Term and any accrued or
     continuing payment obligations;

          (d)    The limitations on liability of Article 9;

          (e)    The confidentiality and nondisclosure obligations of
     Article 10;

          (f)    The indemnification obligations of Article 12;

          (g)    The insurance obligations of Article 14; and

          (h)    The provisions of Article and Sections 4.7 (Sampling), 6.3
     (Taxes), Section 6.4 (Books and Records), Section 13.4 (Survival),
     Section 13.5 (Nonexclusive Rights and Remedies), Section 16.2 (Applicable
     Law), Section 16.3 (Dispute Resolution) and Section 16.11 (Publicity).

In addition, expiration or termination of this Agreement shall not affect the
remedies of the Parties otherwise available at law or in equity in relation to
any rights accrued under this Agreement prior to expiration or termination.

     13.5  NONEXCLUSIVE RIGHTS AND REMEDIES.  Except as otherwise set forth in
this Agreement, all rights and remedies of the Parties provided under this
Agreement are not exclusive and are in addition to any other rights and remedies
provided by law or under this Agreement.

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                                        - 42 -


     13.6  CONDITIONS TO EFFECTIVENESS.  The Effective Date shall be the date
on which the Collaboration Agreement becomes effective.  If the Effective Date
has not occurred within    ***    from the execution date hereof or such later
date as the Parties may agree, either Party may terminate this Agreement by
written notice to the other Party.

                                      ARTICLE 14

                                      INSURANCE

     On or before the Effective Date, each Party shall obtain, and each Party
shall maintain throughout the Term for a period of     ***     thereafter,
insurance issued by independent insurers reasonably selected by such Party
providing the coverage and limits described in Exhibit 14.  Each of the
insurance policies listed in Exhibit 14, except statutory workers' compensation
coverage, shall provide that it may not be terminated, canceled or modified
unless the other Party is given     ***     prior written notice by the
insurance carrier.  Each Party's insurance coverage must be primary coverage
without right of contribution from any insurance of the other Party.  On or
before the Effective Date, and each year thereafter for as long as this
Agreement is in effect, each shall provide the other Party certificates of
insurance evidencing the coverage and limits required by this Article 14.

                                      ARTICLE 15

                                    FORCE MAJEURE

     If any circumstance beyond the reasonable control of either Party occurs
which delays or renders impossible the performance of that Party's obligations
under this Agreement on the dates herein provided (a "Force Majeure"), such
obligation shall be postponed for such time as such performance necessarily has
had to be suspended or delayed on account thereof, provided such Party shall
notify the other Party in writing as soon as practicable, but in no event more
than    ***

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                                        - 43 -


  ***    after the occurrence of such event of Force Majeure, which notice shall
reasonably attempt to identify such obligations under this Agreement and the
extent to which performance will be affected.  In such event, the Parties shall
meet promptly to determine an equitable solution to the effects of any such
event, provided that such Party who fails because of an event of Force Majeure
to perform its obligations hereunder shall upon the cessation of the Force
Majeure event take all reasonable steps within its power to resume with the
least possible delay compliance with its obligations.  Events of Force Majeure
shall include, without limitation, war, revolution, invasion, insurrection,
riots, mob violence, sabotage or other civil disorders, acts of God, limitations
imposed by exchange control regulations or foreign investment regulations or
similar regulations, laws, regulations or rules of any government or
governmental agency, any inordinate and unanticipated delays in the regulatory
review or governmental approval process that are within the sole control of such
government or governmental agency, any delay or failure in manufacture,
production or supply by Third Parties of any goods or services, any withdrawal
or recall of a Product at the direction of the FDA, and any failure of a
computer system.

                                      ARTICLE 16

                                    MISCELLANEOUS

     16.1  RELATIONSHIP OF THE PARTIES.  Each of the Parties shall be
furnishing its services hereunder as an independent contractor, and nothing
herein shall create any association, partnership or joint venture between the
Parties or any employer-employee relationship.  No agent, employee or servant of
either Party shall be or shall be deemed to be the employee, agent or servant of
the other Party, and each Party shall be solely and entirely responsible for its
acts and the acts of its employees.

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

<PAGE>

                                        - 44 -


     16.2  APPLICABLE LAW.  The Agreement shall be governed by the laws of the
State of Delaware applicable to contracts made and to be performed entirely
within such jurisdiction and without giving effect to its choice or conflict of
laws rules or principles.  If any action at law or in equity is necessary to
enforce or interpret the terms of this Agreement, the prevailing party shall be
entitled to reasonable attorneys' fees, costs and necessary disbursements, in
addition to any other relief to which the party may be entitled.

     16.3  DISPUTE RESOLUTION.

          (a)    GENERAL.  The parties recognize that a bonafide dispute as to
     certain matters may arise from time to time during the term of this
     Agreement which may relate to either Party's rights and/or obligations
     hereunder.  The Parties agree that they shall use all reasonable efforts to
     resolve any dispute which may arise in an amicable manner.

          (b)    MANAGEMENT RESOLUTION.  If the Parties are unable to resolve
     such a dispute    ***    , either Party may, by notice to the other party,
     have such dispute referred to the respective officers of the Parties
     designated below.  Such officers shall attempt to resolve the referred
     dispute by good faith negotiations within    ***    after such notice is
     received.  The said designated officers are as follows:  For Abbott, Senior
     Vice President, Pharmaceutical Operations, and for Triangle, Chief
     Executive Officer.

          (c)    ALTERNATIVE DISPUTE RESOLUTION.  The Parties agree that any
     dispute that arises in connection with this Agreement, which cannot be
     amicably resolved by such management discussions shall be resolved by
     binding Alternative Dispute Resolution ("ADR") in the manner described in
     Exhibit 16.3; provided, further, that either Party may seek judicial relief
     or enforcement to pursue equitable remedies not addressed by ADR, to

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

<PAGE>

                                        - 45 -


     pursue a claim of fraudulent or otherwise inequitable treatment under the
     ADR proceedings or to otherwise enforce a judgment under th ADR proceedings
     (including without limitation a judgment for specific performance or
     injunctive relief.

     16.4  COUNTERPARTS.  The Agreement may be executed simultaneously in any
number of counterparts and may be executed by facsimile.  All counterparts shall
collectively constitute one and the same Agreement.

     16.5  NOTICES.  In any case where any notice or other communication is
required or permitted to be given hereunder, such notice or communication shall
be in writing, and sent by overnight express or registered or certified mail
(with return receipt requested) and shall be sent to the following address (or
such other address as either Party may designate from time to time in writing):



     If to Triangle:



           Triangle Pharmaceuticals, Inc.
           4 University Place
           4611 University Drive
           Durham, NC  27707
           Telephone:    (919) 493-5980
           Telefax:      (919) 493-5925
           Attention:    Chief Executive Officer

     Copy to:    General Counsel

     If to Abbott:

           Abbott Laboratories
           Dept. 309; Bldg. AP30
           200 Abbott Park Road
           Abbott Park, EL  60064
           Telephone:    (847) 938-6863
           Telefax:      (847) 938-5383
           Attention:    Senior Vice President, Pharmaceutical Operations

<PAGE>

                                        - 46 -


     Copy to:

           General Counsel
           Abbott Laboratories
           Dept. 364; Bldg.  AP6D
           100 Abbott Park Road
           Abbott Park, EL  60064
           Telephone:    (847) 937-8906
           Telefax:      (847) 938-6277

     16.6  BINDING EFFECT; ASSIGNMENT.  This Agreement may not be assigned, in
whole or in part, by either Party without the prior written consent of the other
Party, and any attempted assignment without such consent shall be null and void.
This Agreement shall inure to the benefit of and be binding upon each of the
Parties hereto and their respective successors and permitted assigns.

     16.7  ENTIRE AGREEMENT.  The terms and conditions contained herein and in
the other Triangle-Abbott Alliance Agreements constitute the entire agreement
between the Parties relating to the subject matter of this Agreement and shall
supersede all previous communications between the Parties with respect to the
subject matter of this Agreement.  Neither Party has entered into this Agreement
in reliance upon any representation, warranty, covenant or undertaking of the
other Party that is not set out or referred to in this Agreement.

     16.8  AMENDMENT.  The Agreement may be varied, amended or extended only by
the written agreement of the Parties through their duly authorized officers or
representatives, specifically referring to this Agreement.

     16.9  SEVERABILITY.  In case any one or more of the provisions contained
herein shall, for any reason be held to be invalid, illegal or unenforceable in
any respect, such invalidity, illegality or unenforceability shall not affect
any other provision of this Agreement, but this Agreement shall

<PAGE>

                                        - 47 -


be construed as if such invalid, illegal or unenforceable provision or
provisions had never been contained herein unless the deletion of such provision
or provisions would result in such a material change as to cause completion of
the transactions contemplated herein to be impossible and provided that the
performance required by this Agreement with such clause deleted remains
substantially consistent with the intent of the Parties.

     16.10 COMPANY EMPLOYEES.  Each Party shall not, and shall cause its
Affiliates not to, directly or indirectly solicit for employment, any employee
of the other Party who has been directly involved in the performance of this
Agreement during the Term and for     ***     after the earlier of the
termination or expiration of this Agreement or the termination of such
individual's employment, with the other Party.  It shall not be a violation of
this provision if any employee responds to a Party's general advertisement of an
open position.

     16.11 PUBLICITY.  Except as otherwise provided herein, each Party shall
maintain the confidentiality of all provisions of this Agreement and this
Agreement itself and, without the prior written consent of both Parties, neither
Party shall make any press release or other public announcement of or otherwise
disclose this Agreement or any of its provisions to any Third Party except:
(i) for disclosure to those of its directors, officers, employees, accountants,
attorneys, advisers and agents whose duties reasonably require them to have
access to the Agreement and, in the case of Triangle, disclosure to the Triangle
Licensors, provided that such directors, officers, employees, accountants,
attorneys, advisers, agents and licensors are required to maintain the
confidentiality of the Agreement to the same extent as if they were Parties
hereto, and (ii) except for such disclosures as may be required by Legal
Requirements, in which case the disclosing Party shall provide the
non-disclosing Party with prompt advance notice of such disclosure so that the
non-disclosing Party shall have the opportunity if it so desires to seek a
protective order or other

*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.

<PAGE>

                                        - 48 -


appropriate remedy and, in connection with any disclosure to the Securities and
Exchange Commission, the disclosing Party shall use reasonable efforts to obtain
confidential treatment for such disclosure.  Promptly following the Execution
Date, the Parties shall issue a mutually acceptable press release, a copy of
which is attached hereto as Exhibit 16.11.

     16.12 HEADINGS. The descriptive headings contained in this Agreement are
included for convenience of reference only and shall not affect the meaning or
interpretation of this Agreement.

     16.13 INTERPRETATION.

          (a)    Wherever any provision of this Agreement uses the term
     "including" (or "includes"), such term shall be deemed to mean "including
     without limitation" and "including but not limited to" (or "includes
     without limitations" and "includes but is not limited to") regardless of
     whether the words "without limitation" or "but not limited to" actually
     follow the term "including" (or "includes").

          (b)    Wherever any provision of this Agreement provides that a
     Party's consent shall not be unreasonably withheld, such provision shall be
     deemed to provide that such consent shall in addition not be unreasonably
     delayed.

          (c)    The recitals set forth at the start of this Agreement, along
     with the Exhibits to this Agreement, and the terms and conditions
     incorporated in such recitals and Exhibits shall be deemed integral parts
     of this Agreement and all references in this Agreement to this Agreement
     shall encompass such recitals and Exhibits and the terms and conditions
     incorporated in such recitals and Exhibits.


<PAGE>

                                        - 49 -


          (d)    In the event of any conflict between the terms and conditions
     of this Agreement and any terms and conditions that may be set forth on any
     order, invoice, verbal agreement or otherwise, the terms and conditions of
     this Agreement shall govern.

          (e)    Unless otherwise explicitly stated, in the event of any
     conflict between the terms of this Agreement and the terms and conditions
     of any of the Exhibits hereto, the terms of this Agreement shall prevail.

          (f)    The Agreement shall be construed as if both Parties drafted it
     jointly, and shall not be construed against either Party as principal
     drafter.

          (g)    Unless otherwise provided, all references to Sections,
     Articles and Exhibits in this Agreement are to Sections, Articles and
     Exhibits of and to this Agreement.

     16.14 NO WAIVER OF RIGHTS.  No failure or delay on the part of either
Party in the exercise of any power or right hereunder shall operate as a waiver
thereof No single or partial exercise of any right or power hereunder shall
operate as a waiver of such right or of any other right or power.  The waiver by
either Party of a breach of any provision of this Agreement shall not operate or
be construed as a waiver of any other or subsequent breach hereunder.

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

TRIANGLE PHARMACEUTICALS, INC.

By:       /s/ David W. Barry
       ------------------------------
Name:      DAVID W. BARRY
       ------------------------------
Title:     CHAIRMAN & CHIEF EXECUTIVE OFFICER
       ------------------------------


ABBOTT LABORATORIES

By:       /s/ Arthur Higgins
       ------------------------------
Name:      ARTHUR HIGGINS
       ------------------------------
Title:     SENIOR VICE PRESIDENT, PHARMACEUTICAL OPERATIONS
      ------------------------------

<PAGE>

                                        - 50 -


                                     EXHIBIT 5.8
                            EXAMPLE OF PAYMENT CALCULATION

<TABLE>
<CAPTION>
                                       Co-Promotion       Representative
                                      Physician Group    Physician Group
                                      ----------------------------------
<S>                                   <C>                <C>

    ***                                     ***                ***
</TABLE>


*** Portions of this page have been omitted pursuant to a request for
    Confidential Treatment and filed separately with the Commission.


<PAGE>

                                                                  EXHIBIT 4.1

                           AMENDMENT TO RIGHTS AGREEMENT

          THIS AMENDMENT (the "Amendment"), is entered into as of June 2, 1999,
by and between TRIANGLE PHARMACEUTICALS, INC., a Delaware corporation (the
"Company"), and AMERICAN STOCK TRANSFER & TRUST COMPANY, as Rights Agent (the
"Rights Agent").

                                      RECITALS

          A.   The Company and the Rights Agent are parties to a Rights
Agreement dated as of February 1, 1999 (the "Rights Agreement").

          B.   Abbott Laboratories, an Illinois corporation ("Abbott"), and the
Company have entered into a Collaboration Agreement made as of June 2, 1999 (the
"Collaboration Agreement"), pursuant to which the parties shall collaborate with
respect to the clinical development, registration, distribution and marketing of
various drugs.

          C.   In connection with the Collaboration Agreement, Abbott and the
Company have entered into, among other agreements, (i) a Common Stock Purchase
Agreement, made as of June 2, 1999 (the "Abbott Stock Purchase Agreement"),
pursuant to which Abbott is to purchase the Shares (as such term is defined in
Section 1.4 of the Abbott Stock Purchase Agreement) and (ii) a Stockholder
Rights Agreement made as of June 2, 1999 (the "Abbott Rights Agreement").

          D.   Pursuant to Section 3.9 of the Abbott Stock Purchase Agreement
and Section 7.1 of the Abbott Rights Agreement, the Board of Directors of the
Company has determined that an amendment to the Rights Agreement as set forth
herein is necessary and desirable to reflect the foregoing and certain other
matters and the Company and the Rights Agent desire to evidence such amendment
in writing.

          Accordingly, the parties agree that:

     1.   AMENDMENT TO DEFINITION OF "ACQUIRING PERSON" SET FORTH IN SECTION
1(a).  The definition of "Acquiring Person" set forth in Section 1(a) of the
Rights Agreement is amended to read in its entirety as follows:

     (a)  "Acquiring Person" shall mean any Person (as such term is hereinafter
     defined) who or which, together with all Affiliates and Associates (as such
     terms are hereinafter defined) of such Person, shall be the Beneficial
     Owner (as such term is hereinafter defined) of 15% or more of the shares of
     Common Stock of the Company then outstanding but shall not include (1) the
     Company, any Subsidiary (as such term is hereinafter defined) of the
     Company, any employee benefit plan of the Company or any Subsidiary of the
     Company, or any entity holding shares of Common Stock for or pursuant to
     the terms of any such plan, (2) during the Interim Period (as defined
     below), Abbott Laboratories, an Illinois corporation (the "Permitted
     Investor"), or any U.S. wholly-owned subsidiaries of Abbott (collectively
     with the Permitted Investor, the

<PAGE>

     "Investor Group") but only to the extent that the Permitted Investor may be
     deemed a Beneficial Owner of the Shares (as defined below) as a result of
     the Permitted Investor entering into the Abbott Stock Purchase Agreement
     (as defined below), unless the Permitted Investor becomes the Beneficial
     Owner (as defined in the Abbott Rights Agreement (as defined below)) of any
     additional securities of the Company other than the Shares during the
     Interim Period, or (3) during the Threshold Period (as hereinafter
     defined), the Investor Group.  For purposes of this Agreement, the "Interim
     Period" shall mean such period commencing as of the date of the Abbott
     Stock Purchase Agreement and ending on the earlier of (x) the "Effective
     Date" as such term is defined in the Collaboration Agreement (as defined
     below) and (y) termination of the Abbott Stock Purchase Agreement.  For
     purposes of this Agreement, the "Threshold Period" shall mean such period
     commencing as of the Effective Date under the Collaboration Agreement and
     ending on the earlier of (xx) such time as the Permitted Investor holds
     less than the Minimum Purchaser Interest in the Company (as defined in
     Section 1.11 of the Abbott Rights Agreement), (yy) such time as the
     Investor Group's Beneficial Ownership (as the term Beneficial Ownership is
     defined in the Abbott Rights Agreement) exceeds the Beneficial Ownership
     Limitation (as defined in Section 5.2(a) of the Abbott Rights Agreement),
     and (zz) such time as the Permitted Investor's rights under Section 7.1 of
     the Abbott Rights Agreement have terminated pursuant to the terms of the
     Abbott Rights Agreement.  Notwithstanding the foregoing:

               (i)  no Person shall become an "Acquiring Person" as the result
     of an acquisition of shares of Common Stock by the Company which, by
     reducing the number of shares outstanding, (a) increases the proportionate
     number of shares beneficially owned by such Person to 15% or more of the
     shares of Common Stock of the Company then outstanding, or, (b) in the case
     of the Investor Group during the Interim Period, increases the
     proportionate number of shares which may be deemed beneficially owned by
     the Investor Group, unless the Permitted Investor becomes the Beneficial
     Owner (as defined in the Abbott Rights Agreement) of any additional
     securities of the Company other than the Shares during the Interim Period,
     or, (c) in the case of the Investor Group during the Threshold Period,
     increases the proportionate number of shares Beneficially Owned (as defined
     in the Abbott Rights Agreement) by the Investor Group to more than the
     Beneficial Ownership Limitation; provided, however, that if by reason of
     share purchases by the Company, (1) a Person shall become the Beneficial
     Owner of 15% or more of the shares of Common Stock of the Company then
     outstanding or, (2) in the case of the Investor Group, the Investor Group's
     ownership increases the Investor Group's Beneficial Ownership (as defined
     in the Abbott Rights Agreement) by any amount during the Interim Period or
     results in the Investor Group's Beneficial Ownership (as defined in the
     Abbott Rights Agreement) to exceed the Beneficial Ownership Limitation at
     any time during the Threshold Period, and, in the case of (1) or (2) above,
     such Person or Investor Group shall, after such share purchases by the
     Company, become the Beneficial Owner of any additional shares of Common
     Stock of the Company, then such Person, including the Investor Group, shall
     be deemed to be an "Acquiring Person" hereunder; and

               (ii) if the Board of Directors of the Company determines in good
     faith that a Person who would otherwise be an "Acquiring Person" as defined
     pursuant to the


                                          2
<PAGE>

     foregoing provisions of this paragraph (a), has become such inadvertently,
     and such Person divests as promptly as practicable a sufficient number of
     shares of Common Stock so that such Person would no longer be an "Acquiring
     Person" (as defined pursuant to the foregoing provisions of this paragraph
     (a)), then such Person shall not be deemed to be an "Acquiring Person" for
     any purpose of this Agreement."

     2.   AMENDMENT TO DEFINITION OF "TRIGGERING EVENT" SET FORTH IN SECTION
1(oo).  The definition of "Triggering Event" set forth in Section 1 (oo) of the
Rights Agreement is amended to add the following sentence to the end thereof:

     "Notwithstanding anything in this Rights Agreement to the contrary, a
     Triggering Event shall not be deemed to have occurred by virtue of the
     Abbott Stock Purchase Agreement and the Related Agreements (as such term is
     defined in the Abbott Stock Purchase Agreement) or by virtue of any of the
     transactions contemplated thereby (excluding during the Interim Period, any
     purchases which result in the Permitted Investor becoming the Beneficial
     Owner (as defined in the Abbott Rights Agreement) of any securities of the
     Company in addition to the Shares and excluding, during the Threshold
     Period, any purchases permitted by Section 5.3 of the Abbott Rights
     Agreement or otherwise which cause the Permitted Investor's Beneficial
     Ownership (as defined in Section 5.4 of the Abbott Rights Agreement) of
     shares of Common Stock to exceed 21% of the then total outstanding shares
     of Common Stock of the Company)."

     3.   AMENDMENT TO SECTION 1.  The following definitions are hereby added to
the end of Section 1 as Sections 1(pp), 1(qq), 1(rr) and 1(ss):

     "(pp)     "Abbott Rights Agreement" shall mean that certain Stockholder
     Rights Agreement made as of June 2, 1999, by and between the Company and
     Abbott Laboratories.

     (qq)  "Abbott Stock Purchase Agreement" shall mean that certain Common
     Stock Purchase Agreement made as of June 2, 1999, by and between the
     Company and Abbott Laboratories.

     (rr) "Collaboration Agreement" shall mean that certain Collaboration
     Agreement made as of June 2, 1999, by and between the Company and Abbott
     Laboratories.

     (ss) "Shares" shall have the meaning assigned to such term in the Abbott
     Stock Purchase Agreement."

     4.   AMENDMENT OF SECTION 3(A).  The first sentence of Section 3(a) of the
Rights Agreement is amended to read in its entirety as follows:

     "Until the earlier of (i) the Close of Business on the Shares
     Acquisition Date and (ii) the Close of Business on the tenth Business
     Day (or such later date as may be determined by action of the
     Company's Board of Directors prior to such time as any Person becomes
     an Acquiring Person and of which the Company will give the Rights
     Agent prompt written notice) after the date that a tender or exchange
     offer


                                          3
<PAGE>


     by any Person (other than the Company, any Subsidiary of the Company, any
     employee benefit plan of the Company or of any Subsidiary of the Company or
     any entity holding shares of Common Stock for or pursuant to the terms of
     any such plan) is first published or sent or given within the meaning of
     Rule 14d-4(a) of the Exchange Act Regulations or any successor rule or of
     the first public announcement of the intention of any Person (other than
     the Company, any Subsidiary of the Company, any employee benefit plan of
     the Company or of any Subsidiary of the Company or any entity holding
     shares of Common Stock for or pursuant to the terms of any such plan) to
     commence, a tender or exchange offer, if upon consummation thereof such
     Person would be the Beneficial Owner of 15% or more of the shares of
     Company Common Stock then outstanding, or, in the case of the Investor
     Group during the Interim Period, the Investor Group purchases any
     securities of the Company which result in the Permitted Investor becoming
     the Beneficial Owner (as defined in the Abbott Rights Agreement) of any
     securities of the Company in addition to the Shares, or in the case of the
     Investor Group during the Threshold Period, the Permitted Investor's
     Beneficial Ownership (as defined in the Abbott Rights Agreement) would
     exceed the Beneficial Ownership Limitation (as defined in the Abbott Rights
     Agreement), (the earlier of (i) and (ii) above being the "Distribution
     Date"), (x) the Rights will be evidenced (subject to the provisions of
     Section 3(b) hereof) by the certificates for shares of Common Stock
     registered in the names of the holders thereof (which certificates shall
     also be deemed to be Rights Certificates) and not by separate Rights
     Certificates, and (y) the right to receive Rights Certificates will be
     transferable only in connection with the transfer of shares of Common
     Stock."

     5.   MISCELLANEOUS.  This Amendment shall be deemed to be a contract
made under the laws of the State of Delaware and for all purposes shall be
governed by and construed in accordance with the laws of such State
applicable to contracts to be made and performed entirely within such State.
This Amendment may be executed in any number of counterparts, each of such
counterparts shall for all purposes be deemed to be an original, and all such
counterparts shall together constitute but one and the same instrument.  If
any term, provision, covenant or restriction of this Amendment is held by a
court of competent jurisdiction or other authority to be invalid, void or
unenforceable, the remainder of the terms, provisions, covenants and
restrictions of this Amendment shall remain in full force and effect and
shall in no way be affected, impaired or invalidated.

                                          4
<PAGE>

          IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be duly executed and attested, all as of the day and year first above written.


 ATTEST:                                 TRIANGLE PHARMACEUTICALS, INC.


 By:  /s/ Chris A. Rallis                By:  /s/ David Barry
    ------------------------------           -------------------------------
      Name:     Chris A. Rallis               Name:   David Barry
            ----------------------                  ------------------------
      Title:    General Counsel               Title:  Chief Executive Officer
            ----------------------                  -------------------------

 ATTEST:                                 AMERICAN STOCK TRANSFER & TRUST
                                         COMPANY


 By:  /s/ Barry S. Rosenthal             By:  /s/ Herbert J. Lemmer
    --------------------------------        ---------------------------------
      Name:     Barry S. Rosenthal            Name:     Herbert J. Lemmer
           -------------------------               --------------------------
      Title:    Vice President                Title:    Vice President
             -----------------------                -------------------------


                                     5



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