AIDS-072975 AIDS072975 Methyl (2R)-2-[({[3-azido-5-(5-methyl-2,4-dioxo(1,3-dihydropyrimidinyl))oxolan-2-yl]methyl}[2-(hydroxymethyl)-5-(5-methyl-2,4-dioxo(1,3-dihydropyrimidinyl))oxolan-3-yloxy]carbonyl)amino]propanoate