Using O=S(=O)(Cl)Cl, Cc1csc2c1c(-c1ccccc1)nc(=O)n2C to produce Cc1c(Cl)sc2c1c(-c1ccccc1)nc(=O)n2C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.