Using O=S(=O)(Cl)c1ccccc1, O=Cc1c(Cl)[nH]c2ccccc12 to produce O=Cc1c(Cl)n(S(=O)(=O)c2ccccc2)c2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.