Using O=C1CNC(=O)N1Cc1ccccc1, O=[N+]([O-])c1ccc(CBr)cc1 to produce O=C1CN(Cc2ccc([N+](=O)[O-])cc2)C(=O)N1Cc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.