Using COC(=O)c1cc(Cl)ccc1N, O=S(=O)(Cl)c1ccccc1 to produce COC(=O)c1cc(Cl)ccc1NS(=O)(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.