Using COC(=O)[C@H](CC(C)C)N[C@@H](C(=O)NC(C)C)c1ccc(F)cc1F to produce CC(C)C[C@H](N[C@@H](C(=O)NC(C)C)c1ccc(F)cc1F)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.