Using COCOc1ccc(C=CC(=O)C=Cc2ccc(OCOC)c(OC)c2)cc1OC to produce COc1cc(C=CC(=O)C=Cc2ccc(O)c(OC)c2)ccc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.