Using CCCCOC(=O)N1CCN(C(=O)[C@H](CC(F)F)NC(=O)OCc2ccccc2)CC1 to produce CCCCOC(=O)N1CCN(C(=O)[C@@H](N)CC(F)F)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.