Showing structure for C[Si](C)(C)OC1=C(O)C=C(C(=O)OCC2OC(OC(=O)C3=CC(O)=C(O[Si](C)(C)C)C(O)=C3)C(O)(COC(=O)C3=CC(O)=C(O)C(O)=C3)C2O)C=C1O