131219-88-0 138580-07-1 (AMMONIUM SALT) 3'-Azido-5'-(O-ethoxycarbonylphosphinyl)-3'-deoxythymidine 5'-EtOCOphosphinyl AZT AIDS-002005 AIDS002005 Thymidine, 3'-azido-3'-deoxy-, 5'-[hydrogen (ethoxycarbonyl)phosphonate]