Showing structure for CC(C)(C)[Si](C)(C)OC1=C(O)C=C(C(=O)OC2CC3=C(OC(=O)C4=CC(O)=C(O)C(O)=C4)C=C(O)C=C3OC2C2=CC=C(O)C(O)=C2)C=C1O