1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 8 . 91 - 8 . 84 ( m , 1 H ) , 8 . 78 ( s , 2 H ) , 8 . 71 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 52 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 26 ( s , 1 H ) , 8 . 22 ( s , 1 H ) , 7 . 86 ( d , J = 5 . 0 Hz , 1 H ) , 7 . 17 ( d , J = 5 . 1 Hz , 1 H ) , 7 . 06 ( t , J = 55 . 2 Hz , 1 H ) , 4 . 47 ( ddd , J = 49 . 0 , 9 . 3 , 2 . 1 Hz , 1 H ) , 4 . 00 ( ddd , J = 36 . 5 , 14 . 6 , 2 . 1 Hz , 1 H ) , 3 . 54 ( ddd , J = 16 . 2 , 14 . 6 , 9 . 3 Hz , 1 H ) , 1 . 30 ( d , J = 1 . 6 Hz , 6 H ) .