Showing structure for CC(=O)O[C@]1(C(C)=O)CC(O[Si](C)(C)C(C)(C)C)[C@H]2[C@@H]3C=C(Cl)C4=CC(O[Si](C)(C)C(C)(C)C)=C5CC5[C@]4(C)[C@H]3CC[C@@]21C