1,1,2,3,3,4,5,5-octafluoropenta-1,4-diene

全氟环戊烯

3,3,4,4,5,5-hexafluoro-1,2-bis(trifluoromethyl)cyclopentene

perfluoro-1-methyl-2-ethylcyclobutene

2,2,3,3,5,5,5-heptafluoro-4-oxopentanoic acid