1 H NMR ( 400 MHz , 클로로포름 - d ) δ 10 . 34 ( d , J = 1 . 1 Hz , 1 H ) , 7 . 56 ( d , J = 2 . 4 Hz , 1 H ) , 7 . 50 - 7 . 33 ( m , 2 H ) , 6 . 63 ( d , J = 2 . 4 Hz , 1 H ) , 5 . 04 ( ddt , J = 9 . 0 , 6 . 6 , 3 . 5 Hz , 1 H ) , 4 . 27 - 4 . 04 ( m , 4 H ) , 3 . 99 ( td , J = 8 . 6 , 5 . 5 Hz , 1 H ) , 2 . 52 ( dtd , J = 13 . 3 , 8 . 2 , 7 . 1 Hz , 1 H ) , 2 . 38 ( dddd , J = 13 . 3 , 8 . 0 , 5 . 5 , 3 . 4 Hz , 1 H ) .