Bis(perfluoroisopropyl)ketone2,4-Bis(trifluoromethyl)-1,1,1,2,4,5,5,5-Octafluoropentan-3-oneBis(heptafluoroisopropyl)methanoneBis(perfluoroisopropyl)methanone 97%双(七氟异丙基)酮Bis(heptafluoroisopropyl)ketoneBis(perfluoroisopropyl) ketone2,4-Bis(trifluoromethyl)octafluoro-3-pentanone