Showing structure for COC1=C2OCOC2=CC2=C1C(=O)C(C1=CC=CC=C1OC1OC(CO[Si](C)(C)C(C)(C)C)C(O)C(O[Si](C)(C)C(C)(C)C)C1O[Si](C)(C)C(C)(C)C)=CO2