Methanesulfonic acid (3aS,4R,6R,6aS)-6-(6-amino-purin-9-yl)-2,2-dimethyl-tetrahydro-cyclopenta[1,3]dioxol-4-yl ester

Acetic acid (1R,4R)-4-(6-amino-purin-9-yl)-cyclopent-2-enyl ester