1H-Benzo[4,5]furo[3',2':5,6]indeno[1,2-b]pyran-4,8-dione,2,3,3a,5a,6b,9,10,10a,11,11a,11b,11c-dodecahydro-11,11a-dihydroxy-3a,10a,11b-trimethyl-,(3aS,5aR,6bR,10aR,11S,11aR,11bS,11cR)-