Synonyms: (3S)-2-[({9-[(2R,3R,4S,5R)-5-({[{[(2R,3S,4R,5R)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-3,4-dihydroxytetrahydrofuran-2-yl]methoxy}(hydroxy)phosphoryl]oxy}methyl)-3,4-dihydroxytetrahydrofuran-2-yl]-9H-purin-6-yl}carbamoyl)amino]-3-hydroxybutanoic acid