Using CC(C)(C)OC(=O)N1CCNC(CC(=O)O)C1, O=[N+]([O-])c1ccc(Br)cc1F to produce CC(C)(C)OC(=O)N1CCN(c2cc(Br)ccc2[N+](=O)[O-])C(CC(=O)O)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.