Using CON(C)C(=O)c1cccc(C)c1[N+](=O)[O-], O=C1CCC(=O)N1Br to produce CON(C)C(=O)c1cccc(CBr)c1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.