6-amino-1,7-dihydropurin-2-one 3373-53-3 ZINC01023252 ST5298861 ZINC04764156 SR-01000637365-1 2H-Purin-2-one, 6-amino-1,3-dihydro- NSC241501 6-Amino-3,9-dihydro-purin-2-one AIDS-045535 AIDS045535 Isoguanine 2H-Purin-2-one, 6-amino-1,3-dihydro- (9CI) 6-Amino-1,3-dihydro-2H-purin-2-one EINECS 222-157-6 NSC 241501