Using NN1C(CNC(=O)OCc2ccccc2)=Nc2ccc(Cl)cc2C1(O)c1ccccc1Cl, O=C(Cl)CCl to produce O=C(CCl)NN1C(CNC(=O)OCc2ccccc2)=Nc2ccc(Cl)cc2C1(O)c1ccccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.