1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 8 . 75 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 66 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 57 ( s , 1 H ) , 8 . 00 ( d , J = 5 . 0 Hz , 1 H ) , 7 . 86 ( s , 1 H ) , 7 . 21 ( d , J = 5 . 0 Hz , 1 H ) , 4 . 15 ( 헵트 , J = 6 . 2 Hz , 1 H ) , 3 . 89 ( d , J = 9 . 7 Hz , 1 H ) , 3 . 14 ( s , 1 H ) , 2 . 15 ( d , J = 10 . 2 Hz , 4 H ) , 1 . 69 - 1 . 45 ( m , 4 H ) , 1 . 40 ( d , J = 6 . 3 Hz , 6 H ) .