COC(=O)C(C)CC(=O)/C=C(\C)[C@H]1C[C@@H](O)[C@@]2(C)C3=C(C(=O)C[C@]12C)[C@@]1(C)CCC(=O)C(C)(C)C1C[C@@H]3O	lanosta-8,20(22)-dien-3,11,23-trioxo-7β,15β-diol-26-oic acid methyl ester