1 H NMR ( 400 MHz , CDCl 3 ) δ 7 . 05 ( d , J = 8 . 4 Hz , 1 H ) , 6 . 94 ( d , J = 2 . 4 Hz , 1 H ) , 6 . 83 ( dd , J = 8 . 4 , 2 . 4 Hz , 1 H ) , 5 . 77 및 5 . 72 ( ABq , J = 6 . 4 Hz , 2 H ) , 4 . 70 - 4 . 64 ( m , 1 H ) , 3 . 16 - 3 . 10 ( m , 2 H ) , 2 . 81 - 2 . 58 ( m , 4 H ) , 2 . 30 - 2 . 28 ( m , 1 H ) , 1 . 92 - 1 . 24 ( m , 18 H ) , 1 . 09 - 1 . 01 ( m , 1 H ) .