(3aS,5S,6R,7aR,7bS,9aS,12aS,12bS)-10-[(1S,2R,3S,4R)-2,3-dihydroxy-1,4,5-trimethylhexyl]-5,6-dihydroxy-7a,9a-dimethylhexadecahydro-3H-benzo[c]indeno[5,4-e]oxepin-3-one