STOCK OPTION GRANT NOTICE AND STOCK OPTION AGREEMENT UNDER THE 2006 EMPLOYMENT COMMENCEMENT INCENTIVE PLAN

SUNESIS PHARMACEUTICALS, INC.

STOCK OPTION GRANT NOTICE AND STOCK OPTION AGREEMENT

UNDER THE 2006 EMPLOYMENT COMMENCEMENT INCENTIVE PLAN

Sunesis Pharmaceuticals, Inc. (the “ Company ”), pursuant to its 2006 Employment Commencement Incentive Plan (the “ Plan ”) hereby grants to the Optionee listed below (“ Optionee ”), an option to purchase the number of shares of the Company’s Stock set forth below. This option is subject to all of the terms and conditions as set forth herein and in the Stock Option Agreement and the Plan, each of which are attached hereto and incorporated herein by reference. Unless otherwise defined herein, the terms defined in the Plan shall have the same defined meanings in this Stock Option Agreement.

By his or her signature and the Company's signature below, Optionee agrees to be bound by the terms and conditions of the Plan and the Stock Option Agreement attached hereto. Optionee has reviewed the Stock Option Agreement and the Plan in their entirety, has had an opportunity to obtain the advice of counsel prior to executing this option and fully understands all provisions of the Grant Notice, the Stock Option Agreement and the Plan. Optionee agrees that Optionee has not been previously employed in any capacity by the Company or a Subsidiary, or if previously employed, has had a bona-fide period of non-employment, and that the grant of this Option is an inducement material to Optionee’s agreement to enter into employment with the Company or Subsidiary. Optionee hereby agrees to accept as binding, conclusive and final all decisions or interpretations of the administrator of the Plan upon any questions arising under the Plan or this option. Optionee further agrees to notify the Company upon any change in the residence address indicated below.

SUNESIS PHARMACEUTICALS, INC.

2006 EMPLOYMENT COMMENCEMENT INCENTIVE PLAN

STOCK OPTION AGREEMENT

Pursuant to the Stock Option Grant Notice (“ Grant Notice ”) to which this Stock Option Agreement (this “ Agreement ”) is attached, Sunesis Pharmaceuticals, Inc. (the “ Company ”) has granted to the Optionee an option under the Company’s 2006 Employment Commencement Incentive Plan (the “ Plan ”) to purchase the number of shares of Stock indicated in the Grant Notice at the exercise price indicated in the Grant Notice. Unless otherwise defined herein, the terms defined in the Plan shall have the same defined meanings in this Stock Option Agreement.

ARTICLE I

DEFINITIONS; INCORPORATION OF TERMS

1.1   General . Wherever the following terms are used in this Agreement they shall have the meanings specified below, unless the context clearly indicates otherwise. Capitalized terms not specifically defined herein shall have the meanings specified in the Plan.

ARTICLE II

GRANT OF OPTION

2.1   Grant of Option . In consideration of the Optionee’s agreement to commence and remain in the employ of the Company or its Subsidiaries and for other good and valuable consideration, effective as of the Grant Date set forth in the Grant Notice (the “ Grant Date ”), the Company irrevocably grants to the Optionee the Option to purchase any part or all of an aggregate of the number of shares of Stock set forth in the Grant Notice, upon the terms and conditions set forth in this Agreement. The Option shall be a Non-Qualified Stock Option.

2.2   Purchase Price . The purchase price of the shares of Stock subject to the Option per share shall be as set forth in the Grant Notice, without commission or other charge; provided, however, that the exercise price shall not be less than the par value of a share of Stock, unless otherwise permitted by applicable law.

2.3   Consideration to the Company . In consideration of the granting of the Option by the Company, the Optionee agrees to render faithful and efficient services to the Company or any Subsidiary, with such duties and responsibilities as the Company shall from time to time prescribe. Nothing in the Plan or this Agreement shall confer upon the Optionee any right to continue in the employ of the Company or any Subsidiary or shall interfere with or restrict in any way the rights of the Company and its Subsidiaries, which are hereby expressly reserved, to discharge the Optionee at any time for any reason whatsoever, with or without cause.

ARTICLE III

PERIOD OF EXERCISABILITY

3.1   Commencement of Exercisability .

(a)   Subject to Sections 3.3 and 5.10, the Option shall become exercisable in such amounts and at such times as are set forth in the Grant Notice.

(b)   No portion of the Option which has not become exercisable at Termination of Service (as defined in Section 3.3 below) shall thereafter become exercisable, except as may be otherwise provided by the Committee or as set forth in a written agreement between the Company and the Optionee.

3.2   Duration of Exercisability . The installments provided for in Section 3.1(a) are cumulative. Each such installment which becomes exercisable pursuant to Section 3.1 shall remain exercisable until it becomes unexercisable under Section 3.3.

3.3   Expiration of Option . The Option may not be exercised to any extent by anyone after the first to occur of the following events:

(a)   The expiration of ten years from the Grant Date; or

(b)   The expiration of three months following the date of the Optionee’s Termination of Service, unless such Termination of Service occurs by reason of the Optionee’s death or Disability or as set forth in a written agreement with the Company; or

(c)   The expiration of twelve months   following the date of the Optionee’s Termination of Service by reason of the Optionee’s Disability; or

(d)    The expiration of eighteen months   following the date of the Optionee’s Termination of Service by reason of the Optionee’s death. 

(e)   For purposes of this Agreement, “ Termination of Service ” means the time when the employment relationship between the Optionee and the Company or any Subsidiary is terminated for any reason, with or without cause, including, but not by way of limitation, a termination by resignation, discharge, death or Disability; but excluding (a) a termination where there is a simultaneous reemployment or continuing employment of the Optionee by the Company or any Subsidiary or a parent corporation thereof (within the meaning of Section 422 of the Code), (b) at the discretion of the Committee, a termination which results in a temporary severance of the employee-employer relationship, and (c) at the discretion of the Committee, a termination which is followed by the simultaneous establishment of a consulting relationship by the Company or a Subsidiary with the former Employee. The Committee, in its absolute discretion, shall determine the effect of all matters and questions relating to Termination of Service for the purposes of this Agreement, and all questions of whether particular leaves of absence for Optionees constitute Terminations of Service. Notwithstanding any other provision of the Plan or this Agreement, the Company or any Subsidiary has an absolute and unrestricted right to terminate the Optionee’s employment and/or consultancy at any time for any reason whatsoever, with or without cause.

ARTICLE IV

EXERCISE OF OPTION

4.1   Person Eligible to Exercise . Except as provided in Sections 5.2(b) and 5.2(c), during the lifetime of the Optionee, only the Optionee may exercise the Option or any portion thereof. After the death of the Optionee, any exercisable portion of the Option may, prior to the time when the Option becomes unexercisable under Section 3.3, be exercised by the Optionee’s beneficiary designated in accordance with Section 9.4 of the Plan. If no beneficiary has been designated or survives the Optionee, the Option may be exercised by the person entitled to such exercise pursuant to the Optionee’s will or the laws of descent and distribution.

4.2   Partial Exercise . Any exercisable portion of the Option or the entire Option, if then wholly exercisable, may be exercised in whole or in part at any time prior to the time when the Option or portion thereof becomes unexercisable under Section 3.3.

4.3   Manner of Exercise . The Option, or any exercisable portion thereof, may be exercised solely by delivery to the Secretary of the Company or the Secretary’s office of all of the following prior to the time when the Option or such portion thereof becomes unexercisable under Section 3.3:

(a)   An Exercise Notice in writing signed by the Optionee or the other person then entitled to exercise the Option or portion thereof, stating that the Option or portion thereof is thereby exercised, such notice complying with all applicable rules established by the Committee. Such notice shall be substantially in the form attached as Exhibit A (or such other form as is prescribed by the Committee); and

(c)   A bona fide written representation and agreement, in such form as is prescribed by the Committee, signed by the Optionee or other person then entitled to exercise such Option or portion thereof, stating that the shares of Stock are being acquired for the