Using COc1cc(-c2ccco2)cc(OC)c1O, O=C(Cl)c1ccccc1 to produce COc1cc(-c2ccco2)cc(OC)c1OC(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.