Acetic acid 2-acetoxymethyl-4-methanesulfonyloxy-butyl ester

2-amino-6-((4-chlorophenyl)sulfanyl)purine

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

2,2-dimethyl-5-[2-(2-amino-6-chloropurine-9-yl)]ethylidene-1,3-dioxane

2,2-dimethyl-5-[2-(2-amino-6-chloropurine-7-yl)]ethylidene-1,3-dioxane