4-Chlorosulfonylimidazole58767-51-433 % similar 1-(1H-Imidazol-4-yl)ethan-1-one61985-25-933 % similar 5-Iodo-2-methyl-1H-imidazole73746-45-933 % similar Histamine dihydrochloride56-92-831 % similar 3-Iodo-1H-pyrazole4522-35-431 % similar Methyl 1H-imidazole-5-carboxylate17325-26-730 % similar 1H-Imidazole-5-acetic acid645-65-830 % similar