Showing structure for C[Si](C)(C)OC1=C(O)C=C(C2=[O+]C3=CC(O)=CC(O[Si](C)(C)C)=C3C=C2OC2OC(COC(=O)/C=C/C3=CC=C(O)C=C3)C(O)C(O[Si](C)(C)C)C2O)C=C1O