1-acetoxy-2-acetoxymethyl-4-(1-ethoxyethoxy)butane

diethyl [2-(1-ethoxyethoxy)ethyl]malonate

2-amino-9-(2-bromoethyl)-6-<(4-chlorophenyl)sulfanyl>-9H-purine

2-amino-6-[(4-chlorophenyl)sulfanyl]-9-[4-hydroxy-3-(hydroxymethyl)butyl]-9H-purine

diethyl 2-<<2-amino-6-(4-chlorophenyl)sulfanyl>purin-9-yl>ethylmalonate