121282-84-6 3,5-Dihydro-7,8-dimethoxy-4H-pyridazino(4,5-b)indol-4-one hydrazone 4-Hydrazino-8,9-dimethoxy-5H-pyridazino(4,5-b)indole 4H-Pyridazino(4,5-b)indol-4-one, 3,5-dihydro-7,8-dimethoxy-, hydrazone BRN 5971012