1 H NMR ( 400 MHz , 클로로포름 - d ) δ 8 . 16 ( s , 1 H ) , 8 . 13 - 8 . 01 ( m , 1 H ) , 4 . 89 ( p , J = 5 . 7 Hz , 1 H ) , 3 . 87 ( dd , J = 12 . 0 , 6 . 5 Hz , 1 H ) , 3 . 77 ( s , 1 H ) , 3 . 57 ( s , 2 H ) , 2 . 60 - 2 . 34 ( m , 2 H ) , 1 . 48 ( s , 9 H ) .