Using O=C(O)[C@H]1CCN(Cc2ccccc2)C1, NCCc1c[nH]c2ccc(Cl)cc12 to produce O=C(NCCc1c[nH]c2ccc(Cl)cc12)[C@H]1CCN(Cc2ccccc2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.