Form: 10-K

Annual report pursuant to Section 13 and 15(d)

March 31, 2009

EXHIBIT 21









Subsidiaries of the Registrant


Access Pharmaceuticals Australia Pty. Limited, a New South Wales, Australia company

MacroChem Corporation, a Delaware company

Somanta Pharmaceuticals, Inc., a Delaware company

Tacora Corporation, a Delaware company

Virologix Corporation, a Delaware company