EXHIBIT 10.59



             AMENDMENT NO. 1 TO THE 2001 AGREEMENT BETWEEN DISCOVERY
                   PARTNERS INTERNATIONAL, INC AND PFIZER INC

Execution of this letter amendment ("Amendment No. 1") between PFIZER INC
("Pfizer") and DISCOVERY PARTNERS INTERNATIONAL, INC. ("DPI"), will serve to
amend an agreement between the parties, effective as of May 15, 2002 (the "2002
Agreement").


WHEREAS, the 2002 Agreement provides for a four (4) year program between DPI and
Pfizer to design and provide Pfizer with protocols and procedures useful in the
production of pharmacologically relevant compounds, and to prosecute said
protocols and procedures to synthesize libraries of Pfizer exclusive compounds
for Pfizer's chemical files; and

WHEREAS, the parties now wish to amend the 2002 Agreement, and

NOW THEREFORE, the Parties agree as follows:

   1    Scope of Amendment No. 1. Amendment No. 1 modifies and amends the 2002
   Agreement only to the extent expressly specified herein. Otherwise, the terms
   and conditions of the 2002 Agreement shall remain unchanged and shall
   continue to be full force and effect.

   2    Definitions. For purposes of this Amendment, capitalized terms in this
   Amendment have the same meaning as in the 2002 Agreement unless modified
   below. The following definition will be added as follows:

        2.1  "Compound Resynthesis Services" means work performed by DPI under a
        Request for Service to re-synthesis compounds according to pre-existing
        protocols directed by a Request for Services form. Such pre-existing
        protocols shall come from those developed under that *** Agreement
        between *** *** and *** and dated *** (as amended hereto) (the " ***
        Agreement"). Technology used to complete Compound Resynthesis Services
        shall be Confidential Information for this Agreement and ownership and
        all other rights and restrictions shall be determined in accordance with
        the terms of the *** Agreement.

Additionally, the following definitions will be modified as set out below; the
term "Protocol Services" should read in its entirety as follows

        2.2  "Protocol Services" shall mean work performed by FTEs at DPI toward
        the generation of *** ideas and / or development and refinement of
        Protocols for synthesis and purification of Compounds of interest to
        Pfizer, as directed by a Pfizer approved Request for Services.

   3    The following changes shall be made to Section 2, Scope of Work.



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        Section 2.1, Scope of Work, third line. The following phrase shall be
        deleted "Attention *** with a copy to *** *** , *** , Discovery Partners
        International, Inc., 9640 Towne Centre Drive, San Diego, CA 92121."

        Section 2.2 the first sentence shall be deleted and replaced with: "Upon
        receipt of a Request for Service, with the *** , DPI will promptly
        conduct a search of its *** ."

        Section 2.4 shall be added. "From time to time, DPI will submit *** ***
        representing a *** of Compounds to Pfizer during the weekly
        teleconference or electronically. This structure submission indicates
        DPI's willingness to perform Services. If Pfizer approves of the ***
        proposed, a Request for Services will be generated. The Request for
        Services will request either Protocol Services, *** basis, or Compound
        Services, invoiced to Pfizer on a *** or *** basis (the "Services"). A
        Request for Services shall be sent to ChemRx Advanced Technologies, 385
        Oyster Point Blvd. Suite 1, South San Francisco, California 94080,
        Attention *** (Pfizer Project Leader) "

        Section 2.5 shall be added: "With regard to Section 2, when Pfizer
        authorizes DPI to perform the Service a copy of the Request for Service
        shall be sent to *** , *** , Discovery Partners International, Inc.,
        9640 Towne Centre Drive, San Diego, CA 92121."

   4    The following changes shall be made to Section 3 and Section 4 relating
   to Payment and Payment for Production of Compound Libraries.

        Section 3.1.4, the last sentence shall be deleted and replaced as
        follows: "DPI's invoices shall be sent to: Pfizer Global Research and
        Development, 50 Pequot Avenue, New London, Connecticut 06320, Attention
        *** ."

        Section 4.1, to the last sentence the following shall be added: "The
        minimum and the maximum compounds comprise compounds from both Compound
        Service and Compound Resynthesis Service."

        Section 4.1.1 shall be deleted in its entirety and the following shall
        be added: "The parties agree that the production and purification of
        Compounds with the criteria set forth in Schedule 4.1 affixed hereto
        shall be calculated on a *** *** basis, in accordance with the table
        below:

                                       ***
                                       ***
                                       ***



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                                       ***

        The parties agree that compounds produced that meet all of the criteria
        set forth in Schedule 4.1 except that there is less than *** but at
        least *** *** of such compounds shall be deemed to be *** . DPI shall
        have the right to deliver to Pfizer *** up to *** of the number of
        Compounds delivered in any individual Library and Pfizer shall accept
        and pay for such *** at the rate of *** . Should DPI produce *** in
        excess of *** of the number of Compounds in any individual Library, DPI
        shall not provide Pfizer *** in excess of such *** without the prior
        written consent of Pfizer. *** shall not count toward the calculation of
        the *** but shall count towards the calculation of the *** at the rate
        of a *** being deemed as *** of *** .

        For point of clarity, the calculated cost, based on the table in Section
        4.1.1, to produce *** Compounds is *** *** For further clarity in the
        same example, if *** were delivered in addition to the *** , the cost
        would be increased by *** for a total of *** . In case of such example
        *** Compounds would be counted towards the *** *** and *** Compounds
        would be counted toward the *** *** *** *** .

        On an individual library basis, following endorsement by the Steering
        Committee, and approval by DPI and Pfizer, the parties may agree to a
        rate different from that set forth above."

        The last sentence of Section 4.1.6 will be deleted and the following
        will be added: "DPI's invoices shall be sent to: Pfizer Global Research
        and Development, 50 Pequot Avenue, New London, Connecticut 06320,
        Attention *** ."

   5    The following changes shall be made to Section 6, Project Program.

        Section 6.4, third line. The following DPI Appointee " *** " shall be
        deleted and replaced with the following DPI Appointee, " *** ".

        Section 6.5, third line. The following phrase "DPI co-chairman shall
        initially be *** *** " shall be deleted and replaced with the following
        phrase "DPI co-chairman shall be *** ".



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        Section 6.6.2, the second sentence shall be modified to read: "All
        communication pertaining to Compound Services, Compound Resynthesis
        Services and Protocol Services shall be the sole responsibility of the
        Steering Committee or the Research Contacts."

   6    The following changes shall be made to Section 7, Reports and Materials.

        Section 7.2.2, the second from last sentence, shall be deleted and the
        following shall be added "Materials shall be delivered to *** ,
        according to Exhibit D Sample and Data Delivery, in a format agreed
        upon by the Steering Committee."

   7    The following changes shall be made to Section 10, Key Investigators.

        Section 10.1 the first sentence shall be deleted and replaced with the
        following " During the Agreement Period, *** , or some other nominee of
        DPI, acceptable to Pfizer acting reasonably, ("Key Investigator") shall
        commit *** of his time each week to the Project Program."

   8.   The following changes shall be made to Section 15, Ownership and
   Intellectual Property.

        Section 15.2, the first sentence shall be deleted and replaced with:
        "Subject to Section 15.1 and 15.3.2, *** *** , to *** and the results of
        the *** ."

The 2002 Agreement, as amended by this letter, is and shall continue to be in
full force and effect without lapse and is hereby in all respect ratified and
confirmed.

If you agree to the terms and provisions hereof, please evidence your agreement
by countersigning one of the two duplicate original copies of this letter and
returning it to us. This letter shall become effective as of February 1, 2002,
when executed by DPI and received by Pfizer.


Agreed: Pfizer Inc                          Agreed: Discovery Partners
International

By: /s/  Edward D. Pagani                   By: /s/  Riccardo Pigliucci
    --------------------------------            --------------------------------

Name:                                       Name: Riccardo Pigliucci
      ------------------------------

Title:                                      Title: Chairman and CEO
       -----------------------------

Date:            6/12/02                    Date:            6/20/02
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