3(2H)-Pyridazinone, 6-(4-chloro-3,5-dimethyl-1H-pyrazol-1-yl)-, hydrazone 3-Hydrazino-6-(3,5-dimethyl-4-chloro-1-pyrazolyl)pyridazine 6-(4-Chloro-3,5-dimethyl-1H-pyrazol-1-yl)-3(2H)-pyridazinone hydrazone 70589-12-7