Perfluorooctanesulfonic acid diethanolamide

heptadecafluoro-N,N-bis(2-hydroxyethyl)octanesulphonamide

N,N-Di(2-hydroxyethyl)-1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-1-octanesulfonamide