2,2,3,3,4,4,5,5,6-nonafluoro-6-(1,1,2,2,3,3,3-heptafluoropropyl)oxane

2,2,3,3,4,4,5,5,6-nonafluoro-6-(heptafluoropropyl)tetrahydro-2H-pyran

2,2,3,3,4,4,5,5,6-nonafluoro-6-(1,1,2,2,3,3,3-heptafluoropropyl)tetrahydropyran