1-Hydrazino-4-(3,5-dimethyl-1-pyrazolyl)pyridazino(4,5-b)indole 1-Hydrazino-4-(3,5-dimethyl-1-pyrazolyl)pyridazino(4,5-b)indole hydrochloride 135561-92-1 135561-93-2 1H-Pyridazino(4,5-b)indol-1-one, 2,5-dihydro-4-(3,5-dimethyl-1H-pyrazol-1-yl)-, hydrazone, hydrochloride A80a CCRIS 6726