Using CC(=O)CS(C)(=O)=O, Nc1ccc(Br)cc1C(=O)c1ccc(Cl)cc1 to produce Cc1nc2ccc(Br)cc2c(-c2ccc(Cl)cc2)c1S(C)(=O)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.