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 . 11 ( s , 1 H ) , 7 . 98 ( d , J = 5 . 1 Hz , 1 H ) , 7 . 64 ( s , 1 H ) , 7 . 21 ( d , J = 5 . 1 Hz , 1 H ) , 6 . 92 ( s , 1 H ) , 4 . 57 - 4 . 30 ( m , 2 H ) , 4 . 08 - 3 . 83 ( m , 1 H ) , 3 . 58 - 3 . 42 ( m , 1 H ) , 3 . 08 - 2 . 95 ( m , 2 H ) , 2 . 88 - 2 . 73 ( m , 1 H ) , 2 . 59 - 2 . 43 ( m , 2 H ) , 2 . 42 - 2 . 30 ( m , 2 H ) , 1 . 29 ( d , J = 1 . 7 Hz , 6 H ) .