Exhibit 32.1
CERTIFICATION PURSUANT TO
SECTION 1350, CHAPTER 63 OF TITLE 18, UNITED STATES CODE,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
Pursuant to Section 1350, Chapter 63 of Title 18, United States Code, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned, as principal executive officer and principal financial officer of CombinatoRx, Incorporated (the “Company”), do hereby certify that to their knowledge:
1) | the Company’s Form 10-Q for the fiscal quarter ended March 31, 2007 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and |
2) | the information contained in the Company’s Form 10-Q for the fiscal quarter ended March 31, 2007 fairly presents, in all material respects, the financial condition and results of operations of the Company. |
/s/ Alexis Borisy |
Alexis Borisy |
President and Chief Executive Officer (principal executive officer) |
/s/ Robert Forrester |
Robert Forrester |
Executive Vice President and Chief Financial Officer (principal financial officer) |
Dated: May 9, 2007