Using Cc1ccc(S(=O)(=O)Oc2ccc(-c3ccccc3)cc2)cc1, COC(Cl)Cl to produce Cc1ccc(S(=O)(=O)Oc2ccc(-c3ccc(C=O)cc3)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.