ContractJoint Filing Agreement • September 21st, 2009 • Southpaw Asset Management LP • Biological products, (no disgnostic substances)
The undersigned hereby agree that the Schedule 13G with respect to the shares of common stock of Vion Pharmaceuticals, Inc., dated as of September 21, 2009, is, and any amendments thereto (including amendments on Schedule 13D) signed by each of the undersigned shall be, filed on behalf of each of the undersigned pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934.
