1 H NMR ( 400 MHz , CDCl 3 ) δ 9 . 09 ( br s , 1 H ) , 7 . 13 ( d , J = 8 . 0 Hz , 1 H ) , 6 . 97 - 6 . 93 ( m , 2 H ) , 5 . 78 및 5 . 72 ( AB q , J = 6 . 8 Hz , 2 H ) , 4 . 18 ( t , J = 6 . 8 Hz , 2 H ) , 3 . 65 ( m , 1 H ) , 3 . 22 - 3 . 07 ( m , 3 H ) , 2 . 80 - 2 . 72 ( m , 1 H ) , 2 . 36 ( d , J = 13 . 6 Hz , 1 H ) , 2 . 06 ( d , J = 12 . 4 Hz , 1 H ) , 1 . 96 - 1 . 88 ( m , 1 H ) , 1 . 71 - 1 . 63 ( m , 4 H ) , 1 . 59 - 1 . 21 ( m , 19 H ) , 1 . 10 - 1 . 01 ( m , 1 H ) , 0 . 88 ( t , J = 6 . 4 Hz , 3 H ) .