1,9-Methano-2H,11H-quino[3”,4”:7′,8′]oxocino[4′,5′:4,5]pyrano[2,3-b]quinoline-2,11-dione,1,3,9,10,10a,16,18,18a-octahydro-9,18,18-trimethyl-, (1R,9R,10aR,18aS)-rel-