1-Methyl-4-(.beta.-aminoethyl)imidazole 1-Methyl-4-histamine 1-Methylhistamine 1H-Imidazole-4-ethanamine, 1-methyl- 501-75-7 Imidazole, 4-(2-aminoethyl)-1-methyl- N-Telle-methylhistamine N.tau.-Methylhistamine N1-Methylhistamine NSC66736