1-Methylguanine 2-Amino-1,7-dihydro-1-methyl-6H-purin-6-one 6H-Purin-6-one, 2-amino-1,7-dihydro-1-methyl- (9CI) 938-85-2 EINECS 213-348-5 Guanine, 1-methyl- (8CI) N1-Methylguanine NSC 50718