1 H NMR ( 400 MHz , CDCl 3 ) δ 8 . 89 ( br , 1 H ) , 8 . 50 ( br , 1 H ) , 7 . 10 ( 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 . 77 및 5 . 74 ( AB q , J = 6 . 8 Hz , 2 H ) , 3 . 72 ( br , 1 H ) , 3 . 25 - 3 . 15 ( m , 2 H ) , 3 . 06 ( br d , J = 19 . 2 Hz , 1 H ) , 2 . 79 - 2 . 77 ( m , 1 H ) , 2 . 44 - 2 . 34 ( m , 2 H ) , 2 . 02 ( d , J = 12 . 0 Hz , 1 H ) , 1 . 94 - 1 . 86 ( m , 1 H ) , 1 . 68 ( d , J = 13 . 2 Hz , 1 H ) , 1 . 66 - 1 . 36 ( m , 9 H ) , 1 . 30 - 1 . 19 ( m , 5 H ) , 1 . 10 - 1 . 01 ( m , 1 H ) , 0 . 82 ( t , J = 7 . 2 Hz , 6 H ) .