Using CS(=O)(=O)c1ccc(-c2oc(C=O)cc(=O)c2-c2ccc(Cl)cc2)cc1 to produce CS(=O)(=O)c1ccc(-c2cc(=O)cc(CO)o2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.