1H-Benz[b]indeno[5,4-d]oxepin-5,8-dione,2,3,3a,9,10,10a,10b,11,12,12a-decahydro-10a,12a-dimethyl-1-[(1R,2E,4S)-1,4,5-trimethyl-2-hexen-1-yl]-,(1R,3aR,10aR,10bS,12aR)-