EXHIBIT 99.2
 
JOINT FILING AGREEMENT
 
The undersigned hereby agree that the Schedule 13D with respect to the Common Stock of Cactus Ventures, Inc., dated as of August 22, 2013, is, and any amendments thereto signed by each of the undersigned shall be, filed on behalf of each of us pursuant to and in accordance with the provisions of Rule 13d-1(f) under the Securities Exchange Act of 1934.
 
 
  Dated:  August 23, 2013
MEMORIAL SLOAN-KETTERING CANCER CENTER
     
 
By:
 /s/ John R. Gunn
   
Name:  John R. Gunn
   
Title: Executive Vice President
     
 
 
 Dated:  August 22, 2013
AHLB HOLDINGS, LLC,
by MEMORIAL SLOAN-KETTERING CANCER CENTER, its sole member
     
 
By:
/s/ John R. Gunn
   
Name:  John R. Gunn
   
Title: Executive Vice President

 
 Dated:  August 22, 2013
ACTINIUM HOLDINGS LTD.
     
 
By:
/s/s Michael Sheffery
   
Name:  Michael Sheffery
   
Title: President and Director