Using O=S(=O)(Cl)Cl, Cn1c(=O)nc(-c2ccccc2Cl)c2ccsc21 to produce Cn1c(=O)nc(-c2ccccc2Cl)c2cc(Cl)sc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.