On May 15, 2012, we reported our financial results for the three months ended March 31, 2012. A copy of the press release issued concerning the foregoing results is furnished herewith as Exhibit 99.1 and is incorporated herein by reference.

The press release is furnished and shall not be deemed "filed" for purposes of
Section 18 of the Securities Exchange Act of 1934, as amended, or subject to the liabilities of that Section or Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended. The information contained herein and in the accompanying exhibit shall not be incorporated by reference into any filing with the Securities and Exchange Commission made by Sunesis, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

(d) Exhibits.

Exhibit No.       Description

99.1              Press release, dated May 15, 2012, entitled "Sunesis
                  Pharmaceuticals Reports First Quarter 2012 Financial Results and
                  Highlights."