Using [O-][I+3]([O-])([O-])[O-], O=C(CSc1ccc(Cl)cc1)c1ccccc1 to produce O=C(CS(=O)c1ccc(Cl)cc1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.