1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 8 . 76 ( s , 1 H ) , 8 . 67 ( s , 1 H ) , 8 . 62 ( s , 1 H ) , 8 . 01 ( d , J = 5 . 1 Hz , 1 H ) , 7 . 88 ( s , 1 H ) , 7 . 22 ( d , J = 5 . 0 Hz , 1 H ) , 4 . 41 ( ddd , J = 49 . 3 , 9 . 4 , 2 . 0 Hz , 1 H ) , 4 . 01 - 3 . 83 ( m , 2 H ) , 3 . 64 - 3 . 44 ( m , 3 H ) , 3 . 16 - 3 . 07 ( m , 0 H ) , 2 . 97 ( d , J = 10 . 7 Hz , 6 H ) , 2 . 25 ( s , 2 H ) , 2 . 02 ( t , J = 18 . 2 Hz , 2 H ) , 1 . 28 ( d , J = 1 . 6 Hz , 6 H ) .