1 H NMR ( 400 MHz , CD 3 OD ) δ 7 . 26 ( d , J = 8 . 4 Hz , 1 H ) , 7 . 03 ( s , 1 H ) , 6 . 96 ( d , J = 8 . 4 Hz , 1 H ) , 6 . 66 ( s , 2 H ) , 5 . 75 및 5 . 72 ( AB q , J = 6 . 8 Hz , 2 H ) , 4 . 93 - 4 . 86 ( m , 1 H ) , 3 . 69 - 3 . 67 ( m , 1 H ) , 3 . 12 - 3 . 08 ( m , 1 H ) , 2 . 99 - 2 . 94 ( m , 1 H ) , 2 . 75 - 2 . 67 ( m , 1 H ) , 2 . 45 ( d , J = 14 . 4 Hz , 1 H ) , 1 . 96 - 1 . 93 ( m , 1 H ) , 1 . 86 - 1 . 78 ( m , 1 H ) , 1 . 75 - 1 . 67 ( m , 1 H ) , 1 . 61 - 1 . 30 ( m , 6 H ) , 1 . 26 ( d , J = 6 . 0 Hz , 6 H ) , 1 . 18 - 1 . 10 ( m , 2 H ) .