Using NCCc1c[nH]c2ccc(Cl)cc12, O=C(O)C(=O)N[C@@H](CO)Cc1ccccc1 to produce O=C(NCCc1c[nH]c2ccc(Cl)cc12)C(=O)N[C@@H](CO)Cc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.