Using O=C(Nc1ccc([N+](=O)[O-])cc1Br)C(F)(C(F)(F)F)C(F)(F)F, O=C([O-])[O-] to produce CN(C(=O)C(F)(C(F)(F)F)C(F)(F)F)c1ccc([N+](=O)[O-])cc1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.