Using CC(=O)O, O=C(N[C@@H](Cc1c[nH]cn1)C(=O)N1CCC[C@H]1C(=O)NCCO)OCc1ccccc1 to produce CC(=O)OCCNC(=O)[C@@H]1CCCN1C(=O)[C@@H](N)Cc1c[nH]cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.