Using O=C(O)C1CCN(c2ccc(Cl)cc2)C1=O, COCCN1CCNCC1 to produce COCCN1CCN(CC2CCN(c3ccc(Cl)cc3)C2=O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.