Using Cc1ccc2oc(-c3cccc([N+](=O)[O-])c3)nc2n1, O=C1CCC(=O)N1Br to produce O=[N+]([O-])c1cccc(-c2nc3nc(CBr)ccc3o2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.