1 H NMR ( 400 MHz , CDCl 3 ) δ 8 . 23 ( d , J = 2 . 0 Hz , 4 H ) , 7 . 42 - 7 . 33 ( m , 6 H ) , 7 . 18 ( d , J = 2 . 4 Hz , 2 H ) , 6 . 96 ( d , J = 8 . 6 Hz , 4 H ) , 6 . 84 ( dd , J = 8 . 8 , 3 . 2 Hz , 2 H ) , 6 . 41 - 6 . 31 ( m , 2 H ) , 5 . 65 - 5 . 22 ( m , 2 H ) , 5 . 46 ( s , 2 H ) , 3 . 36 ( s , 4 H ) , 1 . 68 ( s , 4 H ) , 1 . 47 ( s , 36 H ) , 1 . 32 ( s , 12 H ) , 0 . 82 - 0 . 69 ( m , 24 H ) , 0 . 64 - 0 . 52 ( m , 4 H ) . 19 F { 1 H } NMR ( 376 MHz , CDCl 3 ) δ - 123 . 61 ( s , 2 F ) .