Using COc1ccc2c(c1)CCC(=O)N2S(C)(=O)=O, COC(Cl)Cl to produce COc1cc2c(cc1C=O)N(S(C)(=O)=O)C(=O)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.