1 H NMR ( 400 MHz , 클로로포름 - d ) δ 8 . 47 ( s , 2 H ) , 4 . 70 ( t , J = 6 . 2 Hz , 2 H ) , 4 . 48 ( t , J = 5 . 5 Hz , 2 H ) , 3 . 87 ( p , J = 5 . 5 Hz , 1 H ) , 3 . 81 ( d , J = 6 . 1 Hz , 2 H ) , 3 . 56 ( q , J = 13 . 2 Hz , 4 H ) , 2 . 74 ( q , J = 7 . 8 Hz , 1 H ) , 1 . 58 ( d , J = 8 . 9 Hz , 1 H ) .