Using CSCC[C@@H](COS(C)(=O)=O)NC(=O)OC(C)(C)C, O=S([O-])[O-] to produce CSCC[C@@H](CS(=O)(=O)[O-])NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.