Showing structure for COC1=CC(C2=C(O)C(=O)C3=C(O)C=C(O[Si](C)(C)C)C=C3O2)=CC=C1OC1OC(CO)C(O)C(O[Si](C)(C)C)C1OC1OC(C)C(O)C(O)C1O