((2R,3S,4R,5R)-3,4-Dihydroxy-5-(6-oxo-1,6-dihydro-9H-purin-9-yl)tetrahydrofuran-2-yl)methyl isobutyrate

((2R,3S,4R,5R)-3,4-Dihydroxy-5-(6-oxo-1,6-dihydro-9H-purin-9-yl)tetrahydrofuran-2-yl)methyl isobutyrate