1,2-Bis(perfluorobutyl)ethylene 5-Decene, 1,1,1,2,2,3,3,4,4,7,7,8,8,9,9,10,10,10-octadecafluoro- 84551-43-9 Bis(F-butyl)ethene Bis(perfluorobutyl)ethene Bis-perfluorobutylethene Bis-perfluorobutylethylene Bis-pfbe F-44E F44E Therox