1 H NMR ( 400 MHz , 클로로포름 - d ) δ 8 . 21 ( d , J = 1 . 5 Hz , 1 H ) , 7 . 98 ( d , J = 1 . 5 Hz , 1 H ) , 4 . 73 ( dd , J = 6 . 3 Hz , 2 H ) , 4 . 59 ( t , J = 5 . 8 Hz , 2 H ) , 3 . 90 ( d , J = 10 . 5 Hz , 1 H ) , 3 . 70 ( p , J = 6 . 0 Hz , 1 H ) , 3 . 27 - 3 . 18 ( m , 4 H ) , 3 . 17 ( s , 1 H ) , 1 . 94 - 1 . 83 ( m , 2 H ) , 1 . 74 - 1 . 64 ( m , 2 H ) , 1 . 57 ( s , 1 H ) .