CC(=O)O[C@H]1CC[C@]2(C)C3=C(C(=O)C[C@H]2C1(C)C)[C@]1(C)CC[C@H]([C@H](C)CC/C=C(\C)CO)[C@@]1(C)CC3 lanosta-8,24E-dien-7-oxo-3β-acetyloxy-26-ol