for the following products
Heptadecafluorooctanesulfonic acid tetraethylammonium salt | Heptadecafluorooctylsulfonylaminopropyl)-trimethylammoniumiodide | Tetraethylammonium perfluoroalkylsulfonate (FT-248) and Tetraethylammonium perfluorooctanesulfonate