Using O=C(c1ccccc1)c1cc(Cl)ccc1O, COc1cc2nccc(Cl)c2cc1OC to produce COc1cc2nccc(Oc3ccc(Cl)cc3C(=O)c3ccccc3)c2cc1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.