1-Methylhydrazin-4-(3,5-dimethyl-1-pyrazolyl)pyridazino(4,5-b)indole 135561-94-3 1H-Pyridazino(4,5-b)indol-1-one, 4-(3,5-dimethyl-1H-pyrazol-1-yl)-2,5-dihydro-, methylhydrazone A 80b A-80b