Using CS(=O)(=O)c1cccnc1S(C)(=O)=O, Oc1ccc(Cl)c(Cl)c1 to produce CS(=O)(=O)c1cccnc1Oc1ccc(Cl)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.