IUPAC:2-amino-9-[(2R,4S,5R)-4-hydroxy-5-[hydroxy(13C)methyl](2,3,4,5-13C4)oxolan-2-yl]-6,9-dihydro(2,4,5,6,8-13C5)-3H-purin-6-one
IUPAC:2-amino-9-[(2R,4S,5R)-4-hydroxy-5-[hydroxy(13C)methyl](2,3,4,5-13C4)oxolan-2-yl]-6,9-dihydro(2,4,5,6,8-13C5)-3H-purin-6-one