Using Nc1cc(Cl)ccc1-c1ccccc1OCc1ccccc1, O=C(Cl)CCl to produce O=C(CCl)Nc1cc(Cl)ccc1-c1ccccc1OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.