Using N[C@@H](Cc1ccccc1)C(=O)O, O=C(CNC(=O)OCc1ccccc1)Oc1ccc(Cl)c(Cl)c1Cl to produce O=C(CNC(=O)OCc1ccccc1)N[C@@H](Cc1ccccc1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.