... C6-fluoroketone; it is also known as dodecafluoro-2-methylpentane-3-one; its ASHRAE nomenclature is FK 5-1-12 — the ... ,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and the structural formula CF3CF2C(=O)CF(CF3)2 ... fully fluorinated analog of ethyl isopropyl ketone. Perfluoro(2-methyl-3-pentanone)