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)CCC(O)C(C)(O)CO)[C@@]1(C)CC3 lanosta-8-en-7-oxo-3β-acetyloxy-24,25,26-triol