10-ethyl-1H-furo[3,4-a]carbazole-1,3(10H)-dione 1H-furo[3,4-a]carbazole-1,3(10H)-dione, 10-ethyl- InChI=1/C16H11NO3/c1-2-17-12-6-4-3-5-9(12)10-7-8-11-13(14(10)17)16(19)20-15(11)18/h3-8H,2H2,1H