Showing structure for C[Si](C)(C)OC1=CC(O)=C(OC2OC(C(=O)O)C(O[Si](C)(C)C)C(O)C2O[Si](C)(C)C)C2=C1C(=O)C(OS(=O)(=O)O)=C(C1=CC=C(O)C(O)=C1)O2