1 H NMR ( 400 MHz , 클로로포름 - d ) δ 10 . 26 ( d , J = 1 . 2 Hz , 1 H ) , 6 . 99 ( d , J = 9 . 5 Hz , 2 H ) , 5 . 04 ( dd , J = 8 . 2 , 6 . 3 Hz , 2 H ) , 4 . 62 ( t , J = 6 . 3 Hz , 2 H ) , 4 . 14 ( tt , J = 8 . 2 , 6 . 2 Hz , 1 H ) .