3,3-difluoro-1,4-pentadiene

hexachloro-3,3-difluoro-penta-1,4-diene

3,3,6,6-tetrafluorocyclohexa-1,4-diene

racem.-2,2,3,4,5,5-hexafluoro-adipic acid

1,4-Di-H-hexafluoro-1,4-cyclohexadiene