2-Amino-3,7-dihydro-3-methyl-6H-purin-6-one 2958-98-7 3-Methylguanine 6H-Purin-6-one, 2-amino-3,7-dihydro-3-methyl- (9CI) EINECS 220-988-9 Guanine, 3-methyl- (VAN) (8CI) N3-Methylguanine NSC 62622