1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 9 . 13 ( s , 1 H ) , 8 . 81 - 8 . 75 ( m , 1 H ) , 8 . 53 ( s , 1 H ) , 7 . 97 ( d , J = 5 . 0 Hz , 1 H ) , 7 . 76 ( s , 1 H ) , 7 . 10 ( d , J = 5 . 0 Hz , 1 H ) , 4 . 43 ( ddd , J = 49 . 1 , 9 . 4 , 2 . 1 Hz , 1 H ) , 4 . 16 ( p , J = 6 . 3 Hz , 1 H ) , 3 . 93 ( ddd , J = 36 . 3 , 14 . 6 , 2 . 1 Hz , 1 H ) , 3 . 49 ( td , J = 15 . 3 , 9 . 3 Hz , 1 H ) , 1 . 41 ( d , J = 6 . 4 Hz , 6 H ) , 1 . 29 ( d , J = 1 . 6 Hz , 6 H ) .