2-Heptadecylimidazole23328-87-231 % similar 2-(1H-Imidazol-2-yl)-pyridine18653-75-331 % similar 3-Methyl-2(1H)-pyrazinone19838-07-431 % similar 1H-Imidazole-2-carboxylic acid16042-25-430 % similar 2-Nitroimidazole527-73-130 % similar