2-Aminopurine452-06-2100 % similar 2-Chloropurine1681-15-857 % similar 2-Amino-6-iodopurine19690-23-450 % similar 2,6-Diaminopurine1904-98-948 % similar 2-Amino-6-chloropurine10310-21-146 % similar O-(6)-Methylguanine20535-83-542 % similar 5-Chloro-3H-imidazo[4,5-B]pyridine52090-89-841 % similar O6-Benzylguanine19916-73-539 % similar 5-Aminobenzimidazole934-22-537 % similar 1,3,5-Triazine-2,4-diamine504-08-536 % similar 4,5-Dichloropyrimidin-2-amine403854-21-735 % similar 2,5-Diaminopyrimidine22715-27-134 % similar 5-Bromo-4-chloropyrimidin-2-amine1044767-99-833 % similar 2-Amino-4-chloro-5-fluoropyrimidine1683-75-633 % similar 5-Bromo-4-methylpyrimidin-2-amine17321-93-633 % similar Isoguanine3373-53-333 % similar 6-Bromo-1,2,4-triazin-3-amine69249-22-533 % similar Guanine73-40-533 % similar 2,4-Diaminopyrimidine-5-carbaldehyde20781-06-032 % similar 2-Amino-5-hydroxypyrimidine143489-45-632 % similar