1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ = 8 . 67 ( br s , 1 H ) , 8 . 50 ( br s , 1 H ) , 8 . 25 ( br s , 1 H ) , 8 . 12 ( br s , 1 H ) , 6 . 47 - 6 . 28 ( m , 2 H ) , 5 . 92 - 5 . 79 ( m , 2 H ) , 5 . 74 ( d , J = 50 . 8 Hz , 1 H ) , 5 . 32 ( d , J = 52 . 4 Hz , 1 H ) , 5 . 16 - 4 . 95 ( m , 2 H ) , 4 . 71 - 4 . 25 ( m , 6 H ) , 4 . 17 - 3 . 97 ( m , 2 H ) , 3 . 83 - 3 . 61 ( m , 2 H ) .