9-(4-acetoxybutyl)-1-nitrohypoxanthine

4-(6-chloro-9H-purin-9-yl)butyl acetate

9-(4-acetoxybutyl)hypoxanthine

4-(1-((3aS,4R,6R,6aR)-6-(((bis(phenylamino)phosphoryl)oxy)methyl)-2,2-dimethyltetrahydro-4H-cyclopenta[d][1,3]dioxol-4-yl)-6-oxo-1,6-dihydro-9H-purin-9-yl)butyl acetate