1 H NMR ( 400 MHz , 클로로포름 - d ) δ 10 . 33 ( s , 1 H ) , 7 . 52 ( d , J = 2 . 4 Hz , 1 H ) , 7 . 42 ( d , J = 10 . 1 Hz , 2 H ) , 6 . 57 ( d , J = 2 . 4 Hz , 1 H ) , 3 . 66 ( tt , J = 7 . 4 , 3 . 9 Hz , 1 H ) , 1 . 26 - 1 . 15 ( m , 2 H ) , 1 . 09 ( qd , J = 5 . 7 , 2 . 4 Hz , 2 H ) .