3,11-Dihydro-3,3-diphenylpyrano[3,2-a]carbazole 3,3-Diphenyl-3,11-dihydro-4-oxa-11-aza-benzo[a]fluorene 3,3-diphenyl-3,11-dihydropyrano[3,2-a]carbazole InChI=1/C27H19NO/c1-3-9-19(10-4-1)27(20-11-5-2-6-12-20)18-17-23-25(29-27)16-15-22-21-13-7-8-14-24(21)28-26(22)23/h1-18,28 pyrano[3,2-a]carbazole, 3,11-dihydro-3,3-diphenyl-