1 H NMR ( 400 MHz , CDCl 3 ) δ 7 . 38 - 7 . 33 ( m , 5 H ) , 7 . 02 - 6 . 93 ( m , 3 H ) , 5 . 75 ( s , 2 H ) , 5 . 17 - 5 . 12 ( m , 2 H ) , 4 . 36 ( d , J = 43 . 6 Hz , 1 H ) , 3 . 94 - 3 . 84 ( m , 1 H ) , 3 . 14 - 3 . 04 ( m , 1 H ) , 2 . 72 - 2 . 56 ( m , 3 H ) , 2 . 33 ( d , J = 12 . 0 Hz , 1 H ) , 1 . 73 - 1 . 42 ( m , 6 H ) , 1 . 39 - 1 . 25 ( m , 3 H ) , 1 . 20 ( d , J = 7 . 2 Hz , 6 H ) , 1 . 11 - 1 . 00 ( m , 1 H ) .