Showing structure for CC(=O)OC(C)(C)/C=C/C(=O)C(C)(O[Si](C)(C)C)C1C(O)CC2(C)C3CC=C4C(CC(O[Si](C)(C)C)=C(O[Si](C)(C)C)C4(C)C)C3(C)C(O[Si](C)(C)C)=CC12C