Using CS(=O)(=O)c1ccc(CBr)c(Cl)c1, CC(=O)CC(C)=O to produce CC(=O)C(Cc1ccc(S(C)(=O)=O)cc1Cl)C(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.