Using O=C(c1ccc(Cl)cc1)C1CCNCC1, O=C([O-])O to produce O=C(CCCN1CCC(C(=O)c2ccc(Cl)cc2)CC1)c1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.