124930-59-2 3'-Azido-3'-deoxythymidine 5'-H-phosphonate AIDS-001492 AIDS001492 AZT-5'-H2PO3 AZT-5'-Phosphonate AZT-HP Azidothymidine phosphonate Nicavir Phosphazid Thymidine, 3'-azido-3'-deoxy-, 5'-(hydrogen phosphonate)