1,1,2,2,3,3-hexafluoro-4-(2,2,3,3,4,4-hexafluorocyclobutylidene)cyclobutane

1,1,2,2,3,3,4,4-octafluoro-5-(2,2,3,3,4,4-hexafluorocyclobutylidene)cyclopentane

(2,3,3,4,4,5,5-heptafluorocyclopenten-1-yl)oxymethylbenzene

1,1,2,2,3,3,4,4,5-nonafluoro-5-(trifluoromethoxy)cyclopentane

1,1,2,2,3,3,4,4,5-nonafluoro-5-nitrosocyclopentane