1 H NMR ( 400 MHz , CDCl 3 ) δ 7 . 39 - 7 . 29 ( m , 5 H ) , 7 . 08 - 6 . 98 ( m , 1 H ) , 6 . 96 ( s , 1 H ) , 6 . 87 ( dd , J = 8 . 4 , 2 . 4 Hz , 1 H ) , 5 . 75 및 5 . 72 ( AB q , J = 6 . 4 Hz , 2 H ) , 5 . 16 - 5 . 11 ( m , 2 H ) , 4 . 41 - 4 . 31 ( m , 1 H ) , 3 . 95 ( d , J = 6 . 4 Hz , 2 H ) , 3 . 86 - 3 . 77 ( m , 1 H ) , 3 . 13 - 3 . 03 ( m , 1 H ) , 2 . 75 - 2 . 55 ( m , 2 H ) , 2 . 36 - 2 . 30 ( m , 1 H ) , 2 . 04 - 1 . 92 ( m , 1 H ) , 1 . 72 - 1 . 45 ( m , 5 H ) , 1 . 39 - 1 . 21 ( m , 4 H ) , 1 . 10 - 0 . 99 ( m , 1 H ) , 0 . 93 ( d , J = 6 . 8 Hz , 6 H ) .