1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 8 . 63 ( s , 1 H ) , 8 . 55 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 48 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 13 ( s , 1 H ) , 7 . 80 ( d , J = 4 . 8 Hz , 1 H ) , 7 . 08 ( d , J = 4 . 9 Hz , 1 H ) , 5 . 09 ( dt , J = 7 . 7 , 6 . 7 Hz , 1 H ) , 4 . 93 ( t , J = 7 . 0 Hz , 2 H ) , 4 . 72 ( t , J = 6 . 6 Hz , 2 H ) , 3 . 87 ( p , J = 6 . 3 Hz , 1 H ) , 1 . 33 ( d , J = 6 . 3 Hz , 6 H ) .