1 H NMR ( 499 MHz , 메탄올 - d 4 ) δ 8 . 76 ( d , J = 2 . 1 Hz , 1 H ) , 8 . 66 ( d , J = 2 . 1 Hz , 1 H ) , 8 . 58 ( s , 1 H ) , 8 . 02 ( d , J = 5 . 0 Hz , 1 H ) , 7 . 92 ( s , 1 H ) , 7 . 22 ( d , J = 5 . 0 Hz , 1 H ) , 4 . 37 ( s , 2 H ) , 3 . 90 - 3 . 79 ( m , 1 H ) , 3 . 64 ( s , 3 H ) , 3 . 54 - 3 . 47 ( m , 1 H ) , 2 . 22 ( d , J = 12 . 5 Hz , 2 H ) , 2 . 08 ( d , J = 12 . 5 Hz , 2 H ) , 1 . 56 ( tt , J = 24 . 3 , 12 . 1 Hz , 4 H ) .