1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 10 . 04 ( s , 1 H ) , 8 . 84 ( d , J = 1 . 5 Hz , 1 H ) , 8 . 80 ( s , 1 H ) , 8 . 75 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 70 ( d , J = 2 . 1 Hz , 1 H ) , 8 . 47 ( d , J = 1 . 4 Hz , 1 H ) , 8 . 24 ( s , 2 H ) , 7 . 93 ( d , J = 4 . 9 Hz , 1 H ) , 7 . 19 ( d , J = 5 . 0 Hz , 1 H ) , 4 . 49 ( ddd , J = 49 . 3 , 9 . 1 , 1 . 9 Hz , 1 H ) , 4 . 00 ( ddd , J = 36 . 1 , 14 . 7 , 1 . 8 Hz , 1 H ) , 3 . 65 - 3 . 48 ( m , 1 H ) , 1 . 32 ( s , 6 H ) .