5-Ethyl-1,4-dimethoxy-6-methyl-6H-pyridazino(4,5-b)carbazole 59774-28-6 6H-Pyridazino(4,5-b)carbazole, 5-ethyl-1,4-dimethoxy-6-methyl- BRN 0840573 Dimethoxy-1,4-ethyl-5-methyl-6-pyridazino(4,5-b)carbazole