Using NCCc1ccc(Cl)cc1Cl, COC(=O)C1CCN(c2cc(Cl)nc(OC)n2)CC1 to produce COC(=O)C1CCN(c2cc(NCCc3ccc(Cl)cc3Cl)nc(OC)n2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.