Using O=[N+]([O-])c1cnc2ccc(-c3ccccc3)cc2c1Nc1ccccc1Br to produce Nc1cnc2ccc(-c3ccccc3)cc2c1Nc1ccccc1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.