1 H NMR ( 400 MHz , CDCl 3 ) δ 11 . 06 ( br , 1 H ) , 8 . 73 ( br , 1 H ) , 7 . 13 ( dd , J = 25 . 2 , 8 . 4 Hz , 1 H ) , 6 . 96 - 6 . 88 ( m , 2 H ) , 5 . 75 및 5 . 71 ( AB q , J = 6 . 8 Hz , 2 H ) , 3 . 68 ( br , 1 H ) , 3 . 23 - 3 . 02 ( m , 2 H ) , 2 . 76 ( br , 1 H ) , 2 . 57 - 2 . 50 ( m , 1 H ) , 2 . 36 - 2 . 31 ( m , 2 H ) , 2 . 06 - 2 . 03 ( m , 2 H ) , 1 . 90 - 1 . 13 ( m , 17 H ) , 1 . 09 - 1 . 01 ( m , 1 H ) .