2,3-dihydro-9-ethyl-5-fluoro-9-hydroxy-4-methyl-1H,12H-benzo(de)pyrano(3',4'-6,7)indolizino(1,2-b)quinoline-10,13(9H,15H)-dione
2,3-dihydro-9-ethyl-5-fluoro-9-hydroxy-4-methyl-1h,12h-benzo(de)pyrano(3',4'-6,7)indolizino(1,2-b)quinoline-10,13(9h,15h)-dione