Using CC(C)(C)OC(=O)CO, O=[N+]([O-])c1cc(Br)cnc1Cl to produce CC(C)(C)OC(=O)COc1ncc(Br)cc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.