Using [O-][I+3]([O-])([O-])[O-], O=C(O)Cc1ccc(Sc2ccc(Cl)cc2)cc1 to produce O=C(O)Cc1ccc(S(=O)c2ccc(Cl)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.