00625001_00650000/645756 00625001_00650000/645757 1-[4-(Azadiazomvinyl)-5-({[2-(2,2-dimethylpropanoylthio)ethoxy][(methylethyl)amino]carbonyloxy}methyl)oxolan-2-yl]-5-methyl-1,3-dihydropyrimidine-2,4-dione AIDS-108963 AIDS108963