Using Nc1ccnn1-c1c(Cl)cc(C(F)(F)F)c(F)c1Cl, O=[N+]([O-])O to produce Nc1c([N+](=O)[O-])cnn1-c1c(Cl)cc(C(F)(F)F)c(F)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.