Histamine dihydrochloride56-92-831 % similar 4-Iodopyridin-3-amine105752-11-230 % similar 4-Chloro-3-pyridinamine20511-15-330 % similar 3-Amino-4-bromopyridine239137-39-430 % similar 3-Amino-4-methylpyridine3430-27-130 % similar 5-Amino-4-methylpyrimidine3438-61-730 % similar 5-Amino-4-chloropyrimidine54660-78-530 % similar 4-Phenylimidazole670-95-130 % similar 5-Amino-4-bromopyrimidine849353-34-030 % similar 5-Chloropyridine-3,4-diamine929074-42-030 % similar