1 H NMR ( 400 MHz , 클로로포름 - d ) δ 10 . 28 ( d , J = 1 . 2 Hz , 1 H ) , 6 . 85 ( d , J = 10 . 0 Hz , 2 H ) , 4 . 08 ( dt , J = 11 . 5 , 3 . 2 Hz , 2 H ) , 3 . 60 - 3 . 33 ( m , 2 H ) , 2 . 90 - 2 . 71 ( m , 1 H ) , 1 . 83 - 1 . 70 ( m , 4 H ) .