Using O=S([O-])c1ccccc1, COC(=O)c1c(CBr)ccc2c(Br)ccc(OC)c12 to produce COC(=O)c1c(CS(=O)(=O)c2ccccc2)ccc2c(Br)ccc(OC)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.