1H-Imidazol-2-ylmethylamine dihydrochloride22600-77-733 % similar 2-Nitroimidazole527-73-133 % similar 2-Butyl-1H-imidazole50790-93-732 % similar 2-Hydroxy-3-phenylpyrazine2882-18-031 % similar 2-Undecylimidazole16731-68-330 % similar 2-Heptadecylimidazole23328-87-230 % similar