1,4-Dimethoxy-5,6-dimethyl-6H-pyridazino(4,5-b)carbazole 59774-27-5 6H-Pyridazino(4,5-b)carbazole, 1,4-dimethoxy-5,6-dimethyl- BRN 0835746 Dimethoxy-1,4 dimethyl-5,6 6H-pyridazino(4,5-b)carbazole