1H-Benzo(3a,4)pentaleno(2,1-c)pyridine-1,6(4H)-dione,4a,5,6a,6b,7,8,9,10,10a,11-decahydro-3,9-dimethyl-, (4aS,6aR,6bS,10aS,11aS)- 73885-47-9