Using Cc1[nH]c2ccc(CCOS(C)(=O)=O)cc2c1C(=O)OCc1ccccc1 to produce Cc1[nH]c2ccc(CCOS(C)(=O)=O)cc2c1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.