1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 8 . 76 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 68 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 60 ( s , 1 H ) , 8 . 05 ( d , J = 5 . 1 Hz , 1 H ) , 7 . 91 ( s , 1 H ) , 7 . 22 ( d , J = 5 . 1 Hz , 1 H ) , 4 . 52 - 4 . 31 ( m , 2 H ) , 4 . 22 - 4 . 11 ( m , 1 H ) , 3 . 93 ( dd , J = 34 . 6 , 14 . 4 Hz , 2 H ) , 3 . 58 - 3 . 38 ( m , 2 H ) , 3 . 17 - 3 . 04 ( m , 1 H ) , 2 . 16 ( s , 4 H ) , 1 . 80 - 1 . 53 ( m , 2 H ) , 1 . 29 ( d , J = 1 . 6 Hz , 6 H ) .