4,4,5,5-Tetramethyl-2-[2,3,5,6-tetrafluoro-4-(trifluoromethyl)phenyl]-1,3,2-dioxaborolane4,4,5,5-Tetramethyl-2-[2,3,5,6-tetrafluoro-4-(trifluoromethyl)phenyl]-1,3,2-dioxaborolane