C[C@H]1C(=O)CC[C@@]2(C)C3=CC[C@@H]4C[C@@]3(CC[C@H]12)C[C@]4(O)CO (1S,4R,5R,9R,13R,14R)-14-hydroxy-14-(hydroxymethyl)-5,9-dimethyltetracyclo[11.2.1.01,10.04,9]hexadec-10-en-6-one