133201-13-5 5'-[O-Ethyl-N-(methoxycarbonylethyl)phosphoramidate)-3'-azido-3'-deoxythymidine AIDS-002028 AIDS002028 AZT deriv. L-Alanine, N-(3'-azido-3'-deoxy-P-ethyl-5'-thymidylyl)-, methyl ester, (R)-