Using CC(C)(C)OC(=O)NC(=O)OC(C)(C)C, O=[N+]([O-])c1ccc(-n2cccc2)c(CBr)c1 to produce CC(C)(C)OC(=O)N(Cc1cc([N+](=O)[O-])ccc1-n1cccc1)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.