1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 8 . 33 ( s , 1 H ) , 8 . 08 ( d , J = 9 . 2 Hz , 1 H ) , 7 . 04 ( d , J = 8 . 9 Hz , 1 H ) , 4 . 91 ( t , J = 7 . 3 Hz , 3 H ) , 4 . 76 ( dd , J = 7 . 7 , 5 . 2 Hz , 2 H ) , 4 . 36 ( s , 1 H ) , 4 . 17 ( d , J = 13 . 4 Hz , 3 H ) , 4 . 00 ( s , 2 H ) , 3 . 46 ( d , J = 13 . 2 Hz , 2 H ) , 2 . 28 - 2 . 10 ( m , 2 H ) , 2 . 01 ( d , J = 8 . 4 Hz , 2 H ) .