1 H NMR ( 400 MHz , CDCl 3 ) δ 8 . 24 ( d , J = 1 . 9 Hz , 4 H ) , 7 . 42 - 7 . 30 ( m , 6 H ) , 7 . 14 ( d , J = 2 . 4 Hz , 2 H ) , 7 . 02 - 6 . 92 ( m , 4 H ) , 6 . 82 - 6 . 75 ( m , 2 H ) , 6 . 34 - 6 . 23 ( m , 2 H ) , 5 . 50 - 5 . 40 ( m , 2 H ) , 5 . 38 ( s , 2 H ) , 3 . 56 - 3 . 32 ( m , 4 H ) , 1 . 66 ( s , 4 H ) , 1 . 55 ( s , 18 H ) , 1 . 47 ( s , 36 H ) , 1 . 30 ( s , 12 H ) , 1 . 16 - 1 . 06 ( m , 2 H ) , 0 . 82 ( d , J = 7 . 4 Hz , 12 H ) , 0 . 75 ( s , 18 H ) . 19 F { 1 H } NMR ( 376 MHz , CDCl 3 ) δ - 123 . 93 ( s , 2 F ) .