1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 8 . 74 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 65 ( d , J = 2 . 2 Hz , 1 H ) , 8 . 55 ( s , 1 H ) , 7 . 98 ( d , J = 5 . 0 Hz , 1 H ) , 7 . 84 ( s , 1 H ) , 7 . 20 ( d , J = 5 . 1 Hz , 1 H ) , 4 . 12 ( ddt , J = 15 . 2 , 11 . 0 , 5 . 3 Hz , 2 H ) , 4 . 05 - 3 . 94 ( m , 2 H ) , 3 . 53 ( td , J = 11 . 8 , 2 . 1 Hz , 2 H ) , 1 . 99 - 1 . 88 ( m , 2 H ) , 1 . 67 ( qd , J = 11 . 9 , 4 . 4 Hz , 2 H ) , 1 . 39 ( d , J = 6 . 4 Hz , 6 H ) .