Using O=C(O)c1cccc([N+](=O)[O-])c1, O=C1CCC(=O)N1Br to produce O=C(O)c1cc(Br)cc([N+](=O)[O-])c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.