3(2H)-Pyridazinone, 6-(2-methyl-1H-imidazol-1-yl)-, hydrazone 3-Hydrazino-6-(2-methylimidazol-1-yl)pyridazine 6-(2-Methyl-1H-imidazol-1-yl)-3(2H)-pyridazinone hydrazone 75792-67-5