Using Cn1c(C(F)(F)F)cc(=O)[nH]c1=O, O=[N+]([O-])c1cc(F)c(F)cc1F to produce Cn1c(C(F)(F)F)cc(=O)n(-c2cc(F)c([N+](=O)[O-])cc2F)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.