1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 8 . 18 ( d , J = 2 . 3 Hz , 1 H ) , 7 . 56 ( dd , J = 8 . 8 , 2 . 3 Hz , 1 H ) , 6 . 76 ( d , J = 8 . 8 Hz , 1 H ) , 3 . 95 ( dt , J = 8 . 5 , 4 . 3 Hz , 1 H ) , 3 . 90 ( dd , J = 8 . 8 , 7 . 0 Hz , 2 H ) , 3 . 76 ( q , J = 8 . 2 Hz , 1 H ) , 3 . 68 ( dd , J = 8 . 8 , 6 . 6 Hz , 1 H ) , 3 . 58 ( t , J = 5 . 2 Hz , 4 H ) , 3 . 43 ( s , 1 H ) , 3 . 09 - 2 . 97 ( m , 1 H ) , 2 . 65 ( dt , J = 10 . 6 , 5 . 2 Hz , 2 H ) , 2 . 54 ( dt , J = 11 . 2 , 5 . 2 Hz , 2 H ) , 2 . 20 - 2 . 06 ( m , 1 H ) , 1 . 96 - 1 . 83 ( m , 1 H ) .