1 H NMR ( 400 MHz , CDCl 3 ) δ 8 . 84 ( br s , 1 H ) , 7 . 12 ( d , J = 8 . 4 Hz , 1 H ) , 6 . 99 - 6 . 93 ( m , 2 H ) , 5 . 76 및 5 . 71 ( AB q , J = 6 . 4 Hz , 2 H ) , 4 . 19 ( t , J = 6 . 4 Hz , 2 H ) , 3 . 76 ( m , 1 H ) , 3 . 24 - 3 . 08 ( m , 3 H ) , 2 . 77 ( m , 1 H ) , 2 . 35 ( d , J = 13 . 6 Hz , 1 H ) , 2 . 06 ( d , J = 12 . 0 Hz , 1 H ) , 1 . 96 - 1 . 90 ( m , 1 H ) , 1 . 69 - 1 . 51 ( m , 3 H ) , 1 . 49 - 1 . 34 ( m , 7 H ) , 1 . 26 - 1 . 20 ( m , 1 H ) , 1 . 10 - 1 . 00 ( m , 1 H ) , 0 . 92 ( t , J = 7 . 2 Hz , 3 H ) .