1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 8 . 75 ( m , 2 H ) , 8 . 58 ( s , 1 H ) , 7 . 98 ( d , J = 5 . 0 Hz , 1 H ) , 7 . 81 ( s , 1 H ) , 7 . 22 ( d , J = 5 . 1 Hz , 1 H ) , 4 . 56 - 4 . 31 ( m , 2 H ) , 3 . 94 ( ddd , J = 36 . 6 , 14 . 5 , 2 . 1 Hz , 1 H ) , 3 . 61 - 3 . 40 ( m , 3 H ) , 2 . 65 ( dd , J = 8 . 2 , 3 . 5 Hz , 1 H ) , 2 . 48 ( ddd , J = 11 . 8 , 7 . 7 , 3 . 8 Hz , 2 H ) , 2 . 39 - 2 . 24 ( m , 2 H ) , 1 . 29 ( d , J = 1 . 7 Hz , 6 H ) .