Using O=[N+]([O-])O, CC(=O)Nc1ccc(S(F)(F)(F)(F)F)cc1 to produce CC(=O)Nc1ccc(S(F)(F)(F)(F)F)cc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.