134250-30-9 (R) 134250-44-5 (S) 3'-Azido-3'-deoxythymidine-5'-(ethyl methoxy-6-aminocaproyl)phosphoramidate AIDS-002291 AIDS002291 MeOCOPentNHPO3(Et)AZT Thymidine, 3'-azido-3'-deoxy-, 5'-[ethyl (6-methoxy-6-oxohexyl)phosphoramidate], -