133201-20-4 3'-Azido-3'-deoxythymidine-5'-(butyl methoxyvalinyl)phosphate 5'MeOValPO3(Bu)AZT AIDS-002036 AIDS002036 L-Valine, N-(3'-azido-P-butyl-3'-deoxy-5'-thymidylyl)-, methyl ester, (R)-