1 H NMR ( 400 MHz , CDCl 3 ) δ 7 . 44 ( t , J = 1 . 8 Hz , 2 H ) , 7 . 30 ( d , J = 1 . 8 Hz , 4 H ) , 7 . 10 - 7 . 06 ( m , 2 H ) , 7 . 01 ( dd , J = 8 . 8 , 3 . 2 Hz , 2 H ) , 6 . 91 - 6 . 88 ( m , 2 H ) , 6 . 85 - 6 . 78 ( m , 2 H ) , 6 . 67 - 6 . 62 ( m , 2 H ) , 5 . 35 ( s , 2 H ) , 3 . 77 ( s , 4 H ) , 2 . 29 ( s , 6 H ) , 1 . 34 ( s , 36 H ) , 1 . 20 - 1 . 09 ( m , 2 H ) , 0 . 79 ( d , J = 7 . 4 Hz , 12 H ) . 19 F { 1 H } NMR ( 376 MHz , CDCl 3 ) δ - 123 . 74 ( s , 2 F ) .