Showing structure for COC1=CC(/C=C/C(=O)OCC2OC(OC(C)(C)C3CC4=CC5=C(OC(=O)C=C5)C(O)=C4O3)C(O[Si](C)(C)C)C(O[Si](C)(C)C)C2O[Si](C)(C)C)=CC(OC)=C1O