9-[4-acetoxy-3-(acetoxymethyl)but-1-yl]-2-acetylamino-6-(2',4',6'-triisopropylbenzenesulfonyloxy)-9H-purine

5-[2-(2-aminopurin-9-yl)ethyl]-2,2-dimethyl-1,3-dioxane

diethyl 2-[2-(2-aminopurin-9-yl)ethyl]propanedioate

2-氨基-6-氯嘌呤

9-(2-溴乙基)-6-氯-9h-嘌呤-2-胺