1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 8 . 75 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 68 ( d , J = 2 . 1 Hz , 1 H ) , 8 . 62 ( s , 1 H ) , 8 . 03 ( d , J = 5 . 1 Hz , 1 H ) , 7 . 67 ( s , 1 H ) , 7 . 20 ( d , J = 5 . 1 Hz , 1 H ) , 4 . 59 - 4 . 29 ( m , 2 H ) , 3 . 92 ( ddd , J = 36 . 4 , 14 . 7 , 2 . 1 Hz , 1 H ) , 3 . 51 ( ddd , J = 16 . 0 , 14 . 5 , 9 . 4 Hz , 1 H ) , 3 . 22 ( d , J = 7 . 9 Hz , 2 H ) , 2 . 74 ( tt , J = 8 . 8 , 4 . 5 Hz , 1 H ) , 2 . 55 ( ddd , J = 12 . 7 , 7 . 4 , 4 . 3 Hz , 2 H ) , 2 . 41 ( ddd , J = 13 . 2 , 9 . 2 , 6 . 4 Hz , 2 H ) , 1 . 29 ( d , J = 1 . 6 Hz , 6 H ) .