Using Nc1ccc(Br)cc1, O=[N+]([O-])c1cc(S(=O)(=O)Cl)ccc1Cl to produce O=[N+]([O-])c1cc(S(=O)(=O)Nc2ccc(Br)cc2)ccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.