1 H NMR ( 400 MHz , CDCl 3 ) δ 8 . 22 ( s , 4 H ) , 7 . 42 - 7 . 34 ( m , 6 H ) , 7 . 14 ( d , J = 2 . 4 Hz , 2 H ) , 7 . 05 - 6 . 92 ( m , 6 H ) , 5 . 99 - 5 . 84 ( m , 2 H ) , 5 . 32 ( s , 2 H ) , 3 . 47 ( s , 4 H ) , 1 . 68 ( s , 4 H ) , 1 . 45 ( s , 36 H ) , 1 . 32 ( s , 12 H ) , 1 . 13 - 1 . 03 ( m , 2 H ) , 0 . 85 - 0 . 70 ( m , 30 H ) . 19 F { 1 H } NMR ( 376 MHz , CDCl 3 ) δ - 134 . 45 ( d , J = 22 . 4 Hz , 2 F ) , - 147 . 67 ( d , J = 22 . 3 Hz , 2 F ) .