1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ 8 . 09 ( dd , J = 2 . 2 , 0 . 8 Hz , 1 H ) , 7 . 55 ( dd , J = 8 . 7 , 2 . 2 Hz , 1 H ) , 6 . 36 ( dd , J = 8 . 7 , 0 . 8 Hz , 1 H ) , 4 . 72 ( td , J = 6 . 7 , 0 . 5 Hz , 3 H ) , 4 . 45 ( ddd , J = 6 . 8 , 4 . 9 , 0 . 6 Hz , 3 H ) , 4 . 13 ( s , 5 H ) , 3 . 76 ( tt , J = 6 . 5 , 4 . 9 Hz , 1 H ) , 3 . 50 ( s , 5 H ) , 3 . 44 ( s , 1 H ) .