Using CCOC(=O)C(C)(C)S(=O)(=O)c1ccc(S(C)(=O)=O)cc1 to produce CC(C)(C(=O)O)S(=O)(=O)c1ccc(S(C)(=O)=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.