1 H NMR ( 400 MHz , CDCl 3 ) δ 7 . 34 ( br , 5 H ) , 7 . 01 ( d , J = 8 . 4 Hz , 1 H ) , 6 . 95 ( d , J = 2 . 4 Hz , 1 H ) , 6 . 83 ( dd , J = 8 . 4 , 2 . 4 Hz , 1 H ) , 5 . 76 및 5 . 74 ( AB q , J = 6 . 8 Hz , 2 H ) , 5 . 12 ( br , 2 H ) , 4 . 39 ( br , 1 H ) , 3 . 88 ( br , 1 H ) , 3 . 12 - 3 . 06 ( m , 1 H ) , 2 . 70 - 2 . 62 ( m , 2 H ) , 2 . 43 - 2 . 31 ( m , 2 H ) , 1 . 70 - 1 . 18 ( m , 17 H ) , 1 . 09 - 0 . 97 ( m , 1 H ) , 0 . 81 ( t , J = 7 . 2 Hz , 6 H ) .