1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 9 . 68 ( s , 1 H ) , 8 . 81 ( s , 1 H ) , 8 . 63 ( s , 1 H ) , 8 . 11 ( s , 1 H ) , 7 . 62 ( s , 1 H ) , 7 . 32 ( d , J = 3 . 4 Hz , 4 H ) , 7 . 26 ( d , J = 7 . 6 Hz , 1 H ) , 7 . 13 ( d , J = 5 . 0 Hz , 1 H ) , 6 . 89 ( s , 1 H ) , 4 . 47 ( ddd , J = 48 . 9 , 9 . 2 , 2 . 1 Hz , 1 H ) , 4 . 11 ( s , 2 H ) , 3 . 98 ( ddd , J = 36 . 1 , 14 . 5 , 2 . 3 Hz , 1 H ) , 3 . 61 - 3 . 49 ( m , 1 H ) , 1 . 31 ( d , J = 1 . 7 Hz , 6 H ) .