Using CC(C)(C)C(=O)Nc1nc2c(c(=O)[nH]1)-c1cc([N+](=O)[O-])c(Br)cc1CC2 to produce CC(C)(C)C(=O)Nc1nc2ccc3cc(Br)c([N+](=O)[O-])cc3c2c(=O)[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.