Using O=C(O)C(CSc1ccccc1)CS(=O)(=O)c1ccc(-c2ccc(Cl)cc2)cc1 to produce O=C([O-])C(CSc1ccccc1)CS(=O)(=O)c1ccc(-c2ccc(Cl)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.