Showing structure for COC1=CC=C(C2=C(OC3OC(C(=O)O)C(O)C(O[Si](C)(C)C(C)(C)C)C3O[Si](C)(C)C(C)(C)C)C(=O)C3=C(O)C4=C(C=C3O2)OCO4)C=C1OC