13G Filing: RA Capital Management and Sunesis Pharmaceuticals Inc (SNSS)

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of
1934

(Amendment No. ___)*

SUNESIS PHARMACEUTICALS, INC.

(Name of Issuer)

Common Stock, par value $0.0001 per share

(Title of Class of Securities)

867328700

(CUSIP Number)

October 25, 2017

(Date of Event Which Requires Filing of
this Statement)

Check the appropriate box to designate the rule pursuant to
which this Schedule is filed:

[ X ]	Rule 13d-1(b)
[    ]	Rule 13d-1(c)
[   ]	Rule 13d-1(d)

*The remainder of this cover page shall
be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for
any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder
of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of
1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject
to all other provisions of the Act (however, see the Notes).