1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 8 . 60 - 8 . 51 ( m , 2 H ) , 8 . 47 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 15 ( s , 1 H ) , 7 . 79 ( d , J = 4 . 9 Hz , 1 H ) , 7 . 07 ( d , J = 4 . 8 Hz , 1 H ) , 3 . 94 - 3 . 78 ( m , 3 H ) , 2 . 97 ( t , J = 14 . 0 Hz , 2 H ) , 1 . 34 ( d , J = 6 . 4 Hz , 6 H ) .