2h-Perfluoro-5,8,11,14,17-pentamethyl-3,6,9,12,15,18-hexaoxaheneicosane 3,6,9,12,15,18-Hexaoxaheneicosane, 1,1,1,2,4,4,5,7,7,8,10,10,11,13,13,14,16,16,17,19,19,20,20,21,21,21-hexacosafluoro-5,8,11,14,17-pentakis(trifluoromethyl)- 3,6,9,12,15,18-Hexaoxaheneicosane, 2H-hexacosafluoro-5,8,11,14,17-pentakis(trifluoromethyl) 55154-18-2