((1S,2R)-2,7-diamino-1-((9-(4-hydroxy-5-((phosphonooxy)methyl)tetrahydrofuran-2-yl)-6-oxo-6,9-dihydro-1H-purin-2-yl)amino)-6-methyl-5,8-dioxo-2,3,5,8-tetrahydro-1H-pyrrolo[1,2-a]indol-9-yl)methyl carbamate

2-氨基-6-氯嘌呤

2-氨基-6-巯嘌呤

6-氯嘌呤

6-甲基嘌呤