9,16-diethyl-2,3-dihydro-9-hydroxy-12H-1,4-oxazino(3,2-f)pyrano(3',4'-6,7)indolizino(1,2-b)quinoline-10,13(9H,15H)-dione
9,16-diethyl-2,3-dihydro-9-hydroxy-12h-1,4-oxazino(3,2-f)pyrano(3',4'-6,7)indolizino(1,2-b)quinoline-10,13(9h,15h)-dione