Exhibit 4.23 SECURITIES PURCHASE AGREEMENT dated as of July 21, 2005,Securities Purchase Agreement • August 12th, 2005 • Adventrx Pharmaceuticals Inc • Pharmaceutical preparations • New York
Exhibit 4.27 May [15], 2005 PERSONAL AND CONFIDENTIAL ADVENTRX Pharmaceuticals, Inc. 6725 Mesa Ridge Rd., Suite 100 San Diego, CA 92121 Dear Evan: This letter agreement (this "Agreement") will confirm the understanding and agreement between CIBC World...Letter Agreement • August 12th, 2005 • Adventrx Pharmaceuticals Inc • Pharmaceutical preparations • New York
Exhibit 4.26 NEITHER THIS SECURITY NOR THE SECURITIES INTO WHICH THIS SECURITY IS EXERCISABLE HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION...Adventrx Pharmaceuticals Inc • August 12th, 2005 • Pharmaceutical preparations
BACKGROUNDRights Agreement • August 12th, 2005 • Adventrx Pharmaceuticals Inc • Pharmaceutical preparations • New York
Exhibit 4.25 NEITHER THIS SECURITY NOR THE SECURITIES INTO WHICH THIS SECURITY IS EXERCISABLE HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION...Adventrx Pharmaceuticals Inc • August 12th, 2005 • Pharmaceutical preparations
