Using COc1cccc(F)c1O, O=[N+]([O-])c1cc(Cl)cnc1Br to produce COc1cccc(F)c1Oc1ncc(Cl)cc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.