Showing structure for CC(C)(C)[Si](C)(C)OC1=C(O)C=C(C2OC3=CC(O)=CC(O)=C3CC2OC(=O)C2=CC(O)=C(O)C(O)=C2)C2=C1C(=O)C(O)=CC(C(=O)O)=C2