Using O=C(Cl)C(=O)Cl, COc1cc(-c2ccccc2C(=O)O)cc(OC)c1OC to produce COc1cc(-c2ccccc2C(=O)Cl)cc(OC)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.