1 H NMR ( 400 MHz , CDCl 3 ) δ 8 . 79 ( br , 1 H ) , 8 . 42 ( br , 1 H ) , 7 . 11 ( d , J = 8 . 4 Hz , 1 H ) , 6 . 95 ( d , J = 2 . 4 Hz , 1 H ) , 6 . 91 ( dd , J = 8 . 4 , 2 . 4 Hz , 1 H ) , 5 . 75 및 5 . 73 ( AB q , J = 6 . 8 Hz , 2 H ) , 3 . 69 ( br , 1 H ) , 3 . 23 - 3 . 12 ( m , 3 H ) , 2 . 81 - 2 . 73 ( m , 2 H ) , 2 . 34 ( d , J = 13 . 6 Hz , 1 H ) , 2 . 04 ( d , J = 12 . 4 Hz , 1 H ) , 1 . 98 - 1 . 35 ( m , 15 H ) , 1 . 30 - 1 . 20 ( m , 1 H ) , 1 . 11 - 1 . 01 ( m , 1 H ) .