11H-3(3H)-Oxo-6,6-dimethyl-5,6-dihydropyrano(3,2-a)carbazole 127040-34-0 6,6-Dimethyl-6,11-dihydropyrano(3,2-a)carbazol-3(5H)-one BRN 4259142 Pyrano(3,2-a)carbazol-3(5H)-one, 6,11-dihydro-6,6-dimethyl-