Using COc1cc([N+](=O)[O-])ccc1-c1ccc(Br)s1, O=C([O-])C(F)(F)F to produce COc1cc([N+](=O)[O-])ccc1-c1ccc(C(F)(F)F)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.