1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 8 . 74 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 66 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 57 ( s , 1 H ) , 8 . 02 ( d , J = 5 . 1 Hz , 1 H ) , 7 . 88 ( s , 1 H ) , 7 . 21 ( d , J = 5 . 1 Hz , 1 H ) , 6 . 73 ( d , J = 1 . 0 Hz , 1 H ) , 4 . 56 - 4 . 29 ( m , 1 H ) , 4 . 04 - 3 . 82 ( m , 2 H ) , 3 . 60 - 3 . 42 ( m , 1 H ) , 2 . 90 - 2 . 73 ( m , 1 H ) , 2 . 41 ( s , 3 H ) , 2 . 32 - 2 . 13 ( m , 4 H ) , 1 . 83 - 1 . 52 ( m , 4 H ) , 1 . 29 ( d , J = 1 . 7 Hz , 6 H ) .