1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 8 . 79 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 77 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 60 ( s , 1 H ) , 8 . 56 ( s , 1 H ) , 7 . 95 ( d , J = 5 . 2 Hz , 1 H ) , 7 . 23 ( d , J = 5 . 1 Hz , 1 H ) , 3 . 97 - 3 . 79 ( m , 1 H ) , 2 . 71 ( s , 3 H ) , 2 . 65 ( s , 6 H ) , 2 . 26 - 2 . 13 ( m , 1 H ) , 2 . 09 ( d , J = 12 . 2 Hz , 2 H ) , 1 . 97 ( s , 3 H ) , 1 . 92 ( d , J = 13 . 0 Hz , 2 H ) , 1 . 73 - 1 . 54 ( m , 2 H ) , 1 . 50 - 1 . 31 ( m , 2 H ) .