Using C[C@H](O)c1c(Cl)ccc(F)c1Cl, O=[N+]([O-])c1ncc(Br)cc1O to produce C[C@@H](Oc1cc(Br)cnc1[N+](=O)[O-])c1c(Cl)ccc(F)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.