1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 8 . 76 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 65 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 57 ( s , 1 H ) , 8 . 02 ( d , J = 5 . 1 Hz , 1 H ) , 7 . 87 ( s , 1 H ) , 7 . 22 ( d , J = 5 . 1 Hz , 1 H ) , 4 . 43 ( ddd , J = 49 . 2 , 9 . 5 , 2 . 0 Hz , 1 H ) , 4 . 04 - 3 . 81 ( m , 2 H ) , 3 . 59 - 3 . 41 ( m , 2 H ) , 2 . 37 ( s , 3 H ) , 2 . 31 - 2 . 15 ( m , 4 H ) , 1 . 72 - 1 . 53 ( m , 4 H ) , 1 . 30 ( d , J = 1 . 6 Hz , 6 H ) .