3(2H)-Pyridazinone, 6-(3,4,5-trimethyl-1H-pyrazol-1-yl)-, hydrazone 3-Hydrazino-6-(3,4,5-trimethyl-1-pyrazolyl)pyridazine 6-(3,4,5-Trimethyl-1H-pyrazol-1-yl)-3(2H)-pyridazinone hydrazone 70606-83-6