(2,10'-Bi-12H-1,12-ethano-9H-pyrido(1,2,3-lm)pyrrolo(2,3-d)carbazole)-9,9'-dione, 14,14'-diethylidene-2,2',3,3',10,11'a,11b,11'b,13,13',13a,13'a-dodecahydro-, (2R,3aR,3'aR,11'aS,11bS,11'bS,12S,12'R,13aS,13'aS,14E,14'E)- 279684-12-7 Isosungucine