Showing structure for CC(=O)OCC1OC(C2=C(O[Si](C)(C)C(C)(C)C)C=C3OC(C4=CC=C(O)C(O[Si](C)(C)C(C)(C)C)=C4)=CC(=O)C3=C2O[Si](C)(C)C(C)(C)C)C(OC(C)=O)C(O)C1O