Using Nc1ccc(S)cc1, O=[N+]([O-])c1cc(S(=O)(=O)Nc2ccc(Br)cc2)ccc1Cl to produce Nc1ccc(Sc2ccc(S(=O)(=O)Nc3ccc(Br)cc3)cc2[N+](=O)[O-])cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.