Using COC(=O)C1=Cc2cc(Br)ccc2SCC1, O=S([O-])([O-])=S to produce COC(=O)C1=Cc2cc(Br)ccc2S(=O)(=O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.