EX-99

                                                                    EXHIBIT 99.1
                                                                    ------------


                         Form 4 JOINT FILER INFORMATION


Name:                      Credit Suisse First Boston Equity Partners, L.P.

Address:                   11 Madison Avenue, New York, NY 10010

Designated Filer:          Credit Suisse First Boston

Issuer & Ticker Symbol:    Sunesis Pharmaceuticals, Inc. ("SNSS")

Date of Event
   Requiring Statement:    September 30, 2005


                                            CREDIT SUISSE FIRST BOSTON EQUITY
                                            PARTNERS, L.P.

                                            By: Hemisphere Private Equity
                                                Partners, Ltd., its General
                                                Partner


                                            /s/ Kenneth J. Lohsen
                                            -----------------------------------
                                            Name:  Kenneth J. Lohsen
                                            Title: Attorney-in-Fact



Name:                      Credit Suisse First Boston Equity Partners
                           (Bermuda), L.P.

Address:                   11 Madison Avenue, New York, NY 10010

Designated Filer:          Credit Suisse First Boston

Issuer & Ticker Symbol:    Sunesis Pharmaceuticals, Inc. ("SNSS")

Date of Event
   Requiring Statement:    September 30, 2005


                                            CREDIT SUISSE FIRST BOSTON EQUITY
                                            PARTNERS (BERMUDA), L.P.

                                            By: Hemisphere Private Equity
                                                Partners, Ltd., its General
                                                Partner


                                            /s/ Kenneth J. Lohsen
                                            -----------------------------------
                                            Name:  Kenneth J. Lohsen
                                            Title: Attorney-in-Fact






                        JOINT FILER INFORMATION (CONT'D)


Name:                      EMA Partners Fund 2000, L.P.

Address:                   11 Madison Avenue, New York, NY 10010

Designated Filer:          Credit Suisse First Boston

Issuer & Ticker Symbol:    Sunesis Pharmaceuticals, Inc. ("SNSS")

Date of Event
   Requiring Statement:    September 30, 2005


                                            EMA PARTNERS FUND 2000, L.P.

                                            By: Credit Suisse First Boston
                                                (Bermuda), Limited, its
                                                General Partner


                                            /s/ Kenneth J. Lohsen
                                            -----------------------------------
                                            Name:  Kenneth J. Lohsen
                                            Title: Vice President



Name:                      EMA Private Equity Fund 2000, L.P.

Address:                   11 Madison Avenue, New York, NY 10010

Designated Filer:          Credit Suisse First Boston

Issuer & Ticker Symbol:    Sunesis Pharmaceuticals, Inc. ("SNSS")

Date of Event
   Requiring Statement:    September 30, 2005


                                            EMA PRIVATE EQUITY FUND 2000, L.P.

                                            By: Credit Suisse First Boston
                                                (Bermuda), Limited, its
                                                General Partner


                                            /s/ Kenneth J. Lohsen
                                            -----------------------------------
                                            Name:  Kenneth J. Lohsen
                                            Title: Vice President





                        JOINT FILER INFORMATION (CONT'D)


Name:                      Credit Suisse First Boston U.S. Executive Advisors,
                           L.P.

Address:                   11 Madison Avenue, New York, NY 10010

Designated Filer:          Credit Suisse First Boston

Issuer & Ticker Symbol:    Sunesis Pharmaceuticals, Inc. ("SNSS")

Date of Event
   Requiring Statement:    September 30, 2005


                                           CREDIT SUISSE FIRST BOSTON U.S.
                                           EXECUTIVE ADVISORS, L.P.

                                           By: Hemisphere Private Equity
                                               Partners, Ltd., its General
                                               Partner

                                           /s/ Kenneth J. Lohsen
                                           -----------------------------------
                                           Name:  Kenneth J. Lohsen
                                           Title: Attorney-in-Fact




Name:                      Credit Suisse First Boston Advisory Partners, LLC

Address:                   11 Madison Avenue, New York, NY 10010

Designated Filer:          Credit Suisse First Boston

Issuer & Ticker Symbol:    Sunesis Pharmaceuticals, Inc. ("SNSS")

Date of Event
   Requiring Statement:    September 30, 2005


                                           CREDIT SUISSE FIRST BOSTON ADVISORY
                                           PARTNERS, LLC


                                           /s/ Kenneth J. Lohsen
                                           -----------------------------------
                                           Name:  Kenneth J. Lohsen
                                           Title: Vice President




                        JOINT FILER INFORMATION (CONT'D)


Name:                      Credit Suisse First Boston (Bermuda) Limited

Address:                   11 Madison Avenue, New York, NY 10010

Designated Filer:          Credit Suisse First Boston

Issuer & Ticker Symbol:    Sunesis Pharmaceuticals, Inc. ("SNSS")

Date of Event
   Requiring Statement:    September 30, 2005


                                           CREDIT SUISSE FIRST BOSTON (BERMUDA)
                                           LIMITED


                                           /s/ Kenneth J. Lohsen
                                           -----------------------------------
                                           Name:  Kenneth J. Lohsen
                                           Title: Vice President




Name:                      Hemisphere Private Equity Partners, Ltd.

Address:                   Hemisphere House, Nine Church Street, Hamilton HM11,
                           Hamilton, Bermuda

Designated Filer:          Credit Suisse First Boston

Issuer & Ticker Symbol:    Sunesis Pharmaceuticals, Inc.

Date of Event
   Requiring Statement:    September 30, 2005


                                           HEMISPHERE PRIVATE EQUITY
                                           PARTNERS, LTD.


                                           /s/ Kenneth J. Lohsen
                                           -----------------------------------
                                           Name:  Kenneth J. Lohsen
                                           Title: Attorney-in-Fact





                        JOINT FILER INFORMATION (CONT'D)


Name:                      Hemisphere Private Equity Partners Charitable Trust

Address:                   Hemisphere House, Nine Church Street, Hamilton HM11,
                           Hamilton, Bermuda

Designated Filer:          Credit Suisse First Boston

Issuer & Ticker Symbol:    Sunesis Pharmaceuticals, Inc.

Date of Event
   Requiring Statement:    September 30, 2005


                                           HEMISPHERE PRIVATE EQUITY PARTNERS
                                           CHARITABLE TRUST

                                           By:  Close Trustees (Cayman) Limited,
                                                its Trustees

                                           /s/ Nigel Jeffrey Arkley and
                                           /s/ John Sutlic
                                           -----------------------------------
                                           Name:  Nigel Jeffrey Arkley
                                           Name:  John Sutlic
                                           Title: Authorized Signatories

EX-99

                                                                   EXHIBIT 99.2
                                                                   ------------


1.    Includes (a) 2,341,061 shares of common stock of the issuer (the
      "Shares") held by Credit Suisse First Boston Equity Partners, L.P.
      ("CSFB-EP"); (b) 654,387 Shares held by Credit Suisse First Boston
      Equity Partners (Bermuda), L.P. ("CSFB Bermuda"); (c) 175,775 Shares
      held by EMA Partners Fund 2000, L.P. ("EMA Partners"); (d) 233,004
      Shares held by EMA Private Equity Fund 2000, L.P.("EMA Private"); and
      (e) 2,263 Shares held by Credit Suisse First Boston U.S. Executive
      Advisors, L.P. ("CSFB U.S.", and together with CSFB-EP, CSFB Bermuda,
      EMA Partners and EMA Private, the "CSFB Funds").

2.    In accordance with Securities and Exchange Commission Release No.
      34-39538 (January 12, 1998), this Form 4 is being filed by Credit Suisse
      (the "Bank"), a Swiss bank, on behalf of itself and its subsidiaries, to
      the extent that they constitute the Credit Suisse First Boston business
      unit (the "CSFB business unit") excluding Asset Management (as defined
      below) (the "Reporting Person"). The CSFB business unit is also
      comprised of an asset management business principally conducted under
      the brand name Credit Suisse Asset Management ("Asset Management"). The
      Reporting Person provides financial advisory and capital raising
      services, sales and trading for users and suppliers of capital around
      the world and invests in and manages private equity and venture capital
      funds. Asset Management provides asset management and investment
      advisory services to institutional, mutual fund and private investors
      worldwide. The address of the Bank's principal business and office is
      Uetlibergstrasse 231, P.O. Box 900, CH 8070 Zurich, Switzerland. The
      address of the Reporting Person's principal business and office in the
      United States is Eleven Madison Avenue, New York, New York 10010.

      The CSFB Funds are the holders of the Shares. The principal business
      office of each of the CSFB Funds is 11 Madison Avenue, New York, New
      York 10010.

      Pursuant to investment advisory agreements with CSFB-EP, CSFB Bermuda
      and CSFB U.S., Credit Suisse First Boston Advisory Partners, LLC, a
      Delaware limited liability company ("CSFB Advisory"), makes all
      investment decisions for these three CSFB Funds, including the decision
      to buy, sell or hold securities which comprise the assets of each of
      these entities. In addition, EMA Partners and EMA Private must invest in
      and dispose of its portfolio securities pro rata simultaneously with
      CSFB-EP pursuant to EMA Partners' and EMA Private's limited partnership
      agreements. Thus, CSFB Advisory may be deemed to be the beneficial owner
      of the Shares owned by the CSFB Funds.

      CSFB Advisory is a wholly-owned subsidiary of the Bank. The investment
      committee of CSFB Advisory that oversees the investment decisions made
      for the CSFB Funds includes the employees of the Alternative Capital
      Division of the CSFB business unit.

      The ultimate parent company of the Bank is Credit Suisse Group ("CSG"),
      a corporation formed under the laws of Switzerland. CSG is a global
      financial services company, active in all major financial centers and
      providing a comprehensive range of banking and insurance products. CSG
      has three distinct business units. In addition to the CFSB business
      unit, CSG and its consolidated subsidiaries are comprised of the Credit
      Suisse business unit (the "Credit Suisse business unit") and the
      Winterthur business unit (the "Winterthur business unit"). The Credit
      Suisse business unit offers global private banking and corporate and
      retail banking services in Switzerland. The Winterthur business unit
      provides life and non-life insurance and pension products to private and
      corporate clients worldwide. CSG's business address is Paradeplatz 8,
      P.O. Box 1, CH 8070 Zurich, Switzerland.

      The Bank is comprised of what were formerly known as Credit Suisse First
      Boston and Credit Suisse, each a Swiss bank, which were merged on May 13,
      2005. The operations of the Bank consist principally of the Credit Suisse
      and CSFB business units.

      CSG, for purposes of the federal securities laws, may be deemed ultimately
      to control the Bank and the Reporting Person. CSG, its executive officers
      and directors, and its direct and indirect subsidiaries (including Asset
      Management, the Credit Suisse business unit and the Winterthur business
      unit) may beneficially own Shares to which this Form 4 relates, and such
      Shares are not reported in this Form 4. CSG disclaims beneficial ownership
      of Shares beneficially owned by its direct and indirect subsidiaries,
      including the Reporting Person. Each of Asset Management, the Credit
      Suisse business unit and the Winterthur business unit disclaims beneficial
      ownership of Shares beneficially owned by the Reporting Person. The
      Reporting Person disclaims beneficial ownership of Shares beneficially
      owned by CSG, Asset Management, the Credit Suisse business unit and the
      Winterthur business unit.

      Hemisphere Private Equity Partners, Ltd., a Bermuda company
      ("Hemisphere"), is the general partner of each of CSFB-EP, CSFB Bermuda
      and CSFB U.S. and, other than the investment activities for which CSFB
      Advisory is responsible, manages and controls the affairs of these three
      funds. Hemisphere is engaged in the business of acting as general
      partner to collective investment vehicles organized as limited
      partnerships. Hemisphere is controlled by Hemisphere Private Equity
      Partners Charitable Trust, a Bermuda trust ("Hemisphere Trust"), created
      for the purpose of acting as beneficial owner of Hemisphere. Close
      Trustees (Cayman) Limited is the trustee of Hemisphere Trust.