1 H NMR ( 400 MHz , CDCl 3 ) δ 7 . 05 ( d , J = 8 . 4 Hz , 1 H ) , 6 . 94 ( d , J = 2 . 4 Hz , 1 H ) , 6 . 83 ( dd , J = 8 . 4 , 2 . 4 Hz , 1 H ) , 5 . 76 및 5 . 72 ( AB q , J = 6 . 4 Hz , 2 H ) , 3 . 99 ( d , J = 6 . 4 Hz ) , 3 . 16 - 3 . 08 ( m , 2 H ) , 2 . 80 - 2 . 54 ( m , 4 H ) , 2 . 30 ( d , J = 12 . 8 Hz , 1 H ) , 1 . 75 - 1 . 64 ( m , 8 H ) , 1 . 51 - 1 . 13 ( m , 9 H ) , 1 . 11 - 0 . 93 ( m , 3 H ) .