1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 8 . 75 ( s , 1 H ) , 8 . 71 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 60 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 54 ( dd , J = 2 . 8 , 0 . 7 Hz , 1 H ) , 8 . 12 ( s , 1 H ) , 7 . 97 ( dd , J = 8 . 5 , 2 . 8 Hz , 1 H ) , 7 . 85 ( d , J = 5 . 1 Hz , 1 H ) , 7 . 68 ( dd , J = 8 . 5 , 0 . 7 Hz , 1 H ) , 7 . 16 ( d , J = 5 . 1 Hz , 1 H ) , 4 . 46 ( ddd , J = 49 . 0 , 9 . 3 , 2 . 1 Hz , 1 H ) , 3 . 99 ( ddd , J = 36 . 4 , 14 . 6 , 2 . 1 Hz , 1 H ) , 3 . 53 ( ddd , J = 16 . 2 , 14 . 6 , 9 . 3 Hz , 1 H ) , 1 . 30 ( d , J = 1 . 7 Hz , 6 H ) .