1-Ethyl-5-aminomethyl-4,5,6,7-tetrahydrobenzimidazole dihydrochloride 1H-Benzimidazole-5-methanamine, 4,5,6,7-tetrahydro-1-ethyl-, dihydrochloride 4,5,6,7-Tetrahydro-1-ethyl-1H-benzimidazole-5-methanamine dihydrochloride 96224-21-4