Showing structure for CC(=O)O[C@@H]1CC[C@@]2(C)C(CC[C@]3(C)C2C(=O)C=C2[C@@H]4[C@@H](C)[C@H](C)CC[C@]4(C)CC[C@]23C)[C@@]1(C)C(=O)O[Si](C)(C)C(C)(C)C