1 H NMR ( 400 MHz , 클로로포름 - d ) δ 10 . 35 ( d , J = 1 . 0 Hz , 1 H ) , 7 . 92 ( d , J = 2 . 8 Hz , 1 H ) , 7 . 46 ( d , J = 9 . 6 Hz , 2 H ) , 7 . 24 ( t , J = 60 . 5 Hz , 1 H ) , 6 . 80 ( d , J = 2 . 8 Hz , 1 H ) .