1 H NMR ( 400 MHz , CDCl 3 ) δ 8 . 47 ( s , 1 H ) , 7 . 90 ( d , J = 9 . 0 Hz , 1 H ) , 7 . 73 ( d , J = 2 . 0 Hz , 1 H ) , 7 . 39 ( dd , J = 9 . 0 , 2 . 0 Hz , 1 H ) , 7 . 36 - 7 . 24 ( m , 5 H ) , 4 . 56 ( AB 사 중선 , JAB = 12 . 3 Hz , Δν AB = 9 . 9 Hz , 2 H ) , 4 . 09 ( ddd , J = 12 , 4 . 5 , 1 Hz , 1 H ) , 3 . 90 ( br s , 2 H ) , 3 . 57 - 3 . 40 ( m , 5 H ) , 3 . 39 - 3 . 31 ( br m , 1 H ) , 1 . 91 - 1 . 82 ( m , 2 H ) , 1 . 66 - 1 . 53 ( m , 1 H ) , 1 . 43 - 1 . 33 ( m , 1 H ) .