Using Cc1ccc(S(=O)(=O)Nc2ccc(Cl)cc2[N+](=O)[O-])cc1, BrCCBr to produce Cc1ccc(S(=O)(=O)N(CCBr)c2ccc(Cl)cc2[N+](=O)[O-])cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.