Showing structure for CC(C)(C)[Si](C)(C)OC=C(O[Si](C)(C)C(C)(C)C)[C@@]1(O[Si](C)(C)C(C)(C)C)CC[C@H]2[C@@H]3CC[C@H]4C[C@@H](O)CC[C@]4(C)C3=C(O[Si](C)(C)C(C)(C)C)C[C@@]21C