1,4-Diethoxy-5-ethyl-6-methyl-6H-pyridazino(4,5-b)carbazole 126828-40-8 6H-Pyridazino(4,5-b)carbazole, 1,4-diethoxy-5-ethyl-6-methyl- BRN 5996235 Diethoxy-1,4 ethyl-5 methyl-6 6H-pyridazino(4,5-b)carbazole