1H-Imidazo-4-ethanamine, 5-methyl- 1H-Imidazole-4-ethanamine, 5-methyl- 36376-47-3 36507-31-0 4-Methylhistamine 5(4)-Methylhistamine 5-Methylhistamine IMIDAZOLE, 4-(2-AMINOETHYL)-5-METHYL-