Using COC(=O)c1ccc(Cl)cc1NS(C)(=O)=O, O=C([O-])[O-] to produce COC(=O)c1ccc(Cl)cc1N(C)S(C)(=O)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.