Using O=S([O-])O, CCc1c(C)c(NC(=O)CC(C)(C)C)c(C)c2c1SCC2c1ccc(C(C)C)cc1 to produce CCc1c(C)c(NC(=O)CC(C)(C)C)c(C)c2c1S(=O)(=O)CC2c1ccc(C(C)C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.