1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 8 . 75 ( d , J = 2 . 1 Hz , 1 H ) , 8 . 68 ( d , J = 2 . 1 Hz , 1 H ) , 8 . 56 ( s , 1 H ) , 7 . 99 ( d , J = 5 . 1 Hz , 1 H ) , 7 . 67 ( s , 1 H ) , 7 . 21 ( d , J = 5 . 1 Hz , 1 H ) , 4 . 53 - 4 . 33 ( m , 1 H ) , 4 . 32 - 4 . 22 ( m , 1 H ) , 4 . 03 - 3 . 82 ( m , 1 H ) , 3 . 59 - 3 . 37 ( m , 1 H ) , 2 . 82 - 2 . 62 ( m , 2 H ) , 2 . 39 - 2 . 23 ( m , 2 H ) , 2 . 24 - 2 . 05 ( m , 4 H ) , 1 . 32 ( s , 3 H ) , 1 . 29 ( d , J = 1 . 6 Hz , 6 H ) .