1 H NMR ( 400 MHz , CDCl 3 ) δ 9 . 65 ( br , 1 H ) , 8 . 40 ( br , 1 H ) , 7 . 12 ( d , J = 8 . 4 Hz , 1 H ) , 6 . 95 ( d , J = 2 . 4 Hz , 1 H ) , 6 . 92 ( dd , J = 8 . 4 , 2 . 4 Hz , 1 H ) , 5 . 76 및 5 . 74 ( AB q , J = 6 . 8 Hz , 2 H ) , 3 . 74 ( br , 1 H ) , 3 . 29 - 3 . 17 ( m , 2 H ) , 3 . 05 ( br d , J = 19 . 2 Hz , 1 H ) , 2 . 81 - 2 . 79 ( m , 1 H ) , 2 . 38 - 2 . 34 ( m , 3 H ) , 2 . 03 - 2 . 01 ( m , 1 H ) , 1 . 94 - 1 . 86 ( m , 1 H ) , 1 . 71 - 1 . 21 ( m , 11 H ) , 1 . 11 - 1 . 02 ( m , 1 H ) , 0 . 88 ( t , J = 7 . 6 Hz , 3 H ) .