1 H NMR ( 400 MHz , CDCl 3 ) δ 7 . 05 ( d , J = 8 . 4 Hz , 1 H ) , 6 . 94 ( d , J = 2 . 8 Hz , 1 H ) , 6 . 86 ( dd , J = 8 . 4 , 2 . 8 Hz , 1 H ) , 5 . 75 및 5 . 72 ( AB q , J = 7 . 6 Hz , 2 H ) , 4 . 80 - 4 . 76 ( m , 1 H ) , 3 . 16 - 3 . 04 ( m , 2 H ) , 2 . 78 - 2 . 52 ( m , 4 H ) , 2 . 28 ( d , J = 12 . 0 Hz , 1 H ) , 1 . 82 - 1 . 72 ( m , 1 H ) , 1 . 70 - 1 . 46 ( m , 8 H ) , 1 . 44 - 1 . 24 ( m , 7 H ) , 1 . 12 - 0 . 98 ( m , 2 H ) , 0 . 91 ( t , J = 7 . 2 Hz , 6 H ) .