1 H NMR ( 400 MHz , CDCl 3 ) δ 9 . 20 ( br , 2 H ) , 7 . 10 ( d , J = 8 . 4 Hz , 1 H ) , 6 . 93 ( d , J = 2 . 0 Hz , 1 H ) , 6 . 90 ( dd , J = 8 . 4 , 2 . 4 Hz , 1 H ) , 5 . 75 및 5 . 73 ( AB q , J = 6 . 8 Hz , 2 H ) , 3 . 63 ( br , 2 H ) , 3 . 17 - 3 . 07 ( m , 5 H ) , 2 . 75 ( br , 2 H ) , 2 . 34 ( d , J = 7 . 6 Hz , 2 H ) , 2 . 06 ( d , J = 12 . 4 Hz , 2 H ) , 1 . 97 - 1 . 88 ( m , 2 H ) , 1 . 68 - 1 . 23 ( m , 7 H ) , 1 . 09 - 0 . 92 ( m , 2 H ) , 0 . 86 ( t , J = 6 . 8 Hz , 3 H ) .