2-Amino-3-[4-({[3-(azadiazomvinyl)-5-(5-methyl-2,4-dioxo(1,3-dihydropyrimidinyl))oxolan-2-yl]methyl}[2-(2,2-dimethylpropanoylthio)ethyl]phosphinyloxy)phenyl]propanoic acid AIDS-072143 AIDS072143 Tyrosinyl phosphotriester of AZT