1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 8 . 74 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 67 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 55 ( s , 1 H ) , 8 . 09 ( s , 1 H ) , 7 . 97 ( d , J = 5 . 1 Hz , 1 H ) , 7 . 73 ( s , 1 H ) , 7 . 20 ( d , J = 5 . 0 Hz , 1 H ) , 6 . 88 ( d , J = 1 . 1 Hz , 1 H ) , 4 . 56 - 4 . 33 ( m , 1 H ) , 4 . 33 - 4 . 19 ( m , 1 H ) , 4 . 08 - 3 . 79 ( m , 1 H ) , 3 . 65 - 3 . 41 ( m , 1 H ) , 2 . 91 ( d , J = 7 . 3 Hz , 2 H ) , 2 . 89 - 2 . 77 ( m , 2 H ) , 2 . 68 - 2 . 48 ( m , 1 H ) , 1 . 95 - 1 . 76 ( m , 2 H ) , 1 . 29 ( d , J = 1 . 6 Hz , 6 H ) .