Perfluoro-2,5-diMethyl-3,6-dioxanonanoic acid ethyl ester

2-[3-(Trifluoromethyl)decafluoro-1,4-dioxaheptan-1-yl]-2,3,3,3-tetrafluoropropionic acid ethyl ester

2,3,3,3-Tetrafluoro-2-[1,1,2,3,3,3-hexafluoro-2-(heptafluoropropoxy)propoxy]propanoic acid ethyl ester