1 H NMR ( 400 MHz , 클로로포름 - d ) δ 8 . 31 ( d , J = 2 . 3 Hz , 1 H ) , 7 . 66 ( d , J = 9 . 0 Hz , 1 H ) , 6 . 48 ( d , J = 9 . 0 Hz , 1 H ) , 4 . 62 ( d , J = 5 . 5 Hz , 2 H ) , 4 . 26 ( d , J = 5 . 5 Hz , 2 H ) , 3 . 54 ( s , 4 H ) , 2 . 44 ( s , 5 H ) , 1 . 37 ( s , 3 H ) .