4,4,5,5,5-pentafluoro-3-oxo-2-(triphenyl-l⁵-phosphanylidene)pentanenitrile

ethyl 2-acetyl-4,4,5,5,5-pentafluoro-3-oxopentanoate

2,2,3,3,3-pentafluoro-N'-(2,2,3,3,3-pentafluoropropanoyl)propanehydrazide

O-<2,2,3,3,3-Pentafluor-propionyl>-2,2,3,3,3-pentafluor-propionsaeureamidoxim