Showing structure for C[Si](C)(C)OC1=CC2=C(C(=O)C(O)C(C3=CC=C(O)C(OC4OC(C(=O)O)C(O[Si](C)(C)C)C(O)C4O[Si](C)(C)C)=C3)O2)C(O[Si](C)(C)C)=C1