1 H NMR ( 400 MHz , 클로로포름 - d ) δ 8 . 34 ( d , J = 2 . 2 Hz , 1 H ) , 7 . 59 ( d , J = 8 . 8 Hz , 1 H ) , 6 . 69 ( d , J = 8 . 9 Hz , 1 H ) , 4 . 80 ( d , J = 13 . 4 Hz , 2 H ) , 4 . 34 ( t , J = 6 . 4 Hz , 2 H ) , 4 . 12 ( t , J = 6 . 2 Hz , 2 H ) , 3 . 24 - 2 . 99 ( m , 3 H ) , 2 . 91 ( d , J = 10 . 9 Hz , 2 H ) , 2 . 17 ( dd , J = 11 . 3 , 2 . 3 Hz , 2 H ) , 1 . 55 ( s , 1 H ) , 1 . 03 ( s , 6 H ) .