Using C[C@H](N[C@@H](CCc1ccccc1)C(=O)OCc1ccccc1)C(=O)N1C(=O)N(Cc2ccccc2)C[C@H]1C(=O)O to produce C[C@H](N[C@@H](CCc1ccccc1)C(=O)O)C(=O)N1C(=O)N(Cc2ccccc2)C[C@H]1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.