Using O=[N+]([O-])O, COC(=O)c1cc(C(F)(F)F)nn1-c1ccccc1 to produce COC(=O)c1cc(C(F)(F)F)nn1-c1ccc([N+](=O)[O-])cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.