Using Cc1cc(OS(C)(=O)=O)cc2c1C(CC(=O)[O-])OB2O to produce Cc1cc(OS(C)(=O)=O)cc2c1C(CC(=O)O)OB2O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.