Using c1nc2c([nH]1)CCNC2, O=C=NCc1ccc(Cl)cc1Cl to produce O=C(NCc1ccc(Cl)cc1Cl)N1CCc2[nH]cnc2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.