3-((1,1,2,2-Tetrahydroperfluoro (C6-C20)alkyl)thio)-N-(1,1-dimethyl-3-oxobutyl)propionamide 71608-63-4 Propanamide, N-(1,1-dimethyl-3-oxobutyl)-, 3-((gamma-omega-perfluoro-C6-20-alkyl)thio) derivs.