5-ethyl-9,10-difluoro-1,4,5,13-tetrahydro-5-hydroxy-3H,15H-oxepino(3',4'-6,7)indolizino(1,2-b)quinoline-3,15-dione
5-ethyl-9,10-difluoro-1,4,5,13-tetrahydro-5-hydroxy-3h,15h-oxepino(3',4'-6,7)indolizino(1,2-b)quinoline-3,15-dione