Using O=C(O)c1c(F)cccc1C(F)(F)F, O=[N+]([O-])O to produce O=C(O)c1c(F)ccc([N+](=O)[O-])c1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.