1H-Imidazole-4-ethanamine, 5-methyl-, dihydrochloride (9CI) 36376-47-3 36507-31-0 4-(2-Aminoethyl)-5-methylimidazole dihydrochloride 4-Methylhistamine dihydrochloride 5-Methyl-1H-imidazole-4-ethanamine dihydrochloride 5-Methylhistamine dihydrochloride Imidazole, 4-(2-aminoethyl)-5-methyl-, dihydrochloride