((2R,3S,5R)-5-(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)-3-((methoxycarbonothioyl)oxy)tetrahydrofuran-2-yl)methyl acetate

2,2-Dimethyl-propionic acid (2R,3S,5R)-5-(2-amino-6-oxo-1,6-dihydro-purin-9-yl)-3-methoxythiocarbonyloxy-tetrahydro-furan-2-ylmethyl ester