Using Nc1ccc(Br)cc1[N+](=O)[O-], CSc1nc2ccc(C=O)cc2o1 to produce CSc1nc2ccc(CNc3ccc(Br)cc3[N+](=O)[O-])cc2o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.