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