1 H NMR ( 400 MHz , 클로로포름 - d ) δ 8 . 25 ( s , 1 H ) , 7 . 56 - 7 . 43 ( m , 1 H ) , 6 . 48 ( d , J = 8 . 9 Hz , 1 H ) , 4 . 42 ( d , J = 13 . 5 Hz , 2 H ) , 4 . 12 ( d , J = 12 . 1 Hz , 2 H ) , 3 . 93 ( d , J = 12 . 2 Hz , 2 H ) , 3 . 59 ( d , J = 13 . 6 Hz , 2 H ) , 3 . 36 ( s , 2 H ) , 3 . 00 ( d , J = 1 . 1 Hz , 1 H ) .