Using [S-2], CCN(CC)S(=O)(=O)c1cc(Cl)c(Cl)c(Cl)c1Cl to produce CCN(CC)S(=O)(=O)c1cc(Cl)c(Cl)c(Cl)c1S, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.