1 H NMR ( 400 MHz , 클로로포름 - d ) δ 8 . 34 ( s , 1 H ) , 7 . 71 ( s , 1 H ) , 6 . 62 ( s , 1 H ) , 4 . 70 ( s , 2 H ) , 4 . 37 ( t , J = 6 . 5 Hz , 2 H ) , 4 . 15 ( t , J = 6 . 4 Hz , 3 H ) , 3 . 29 - 3 . 05 ( m , 3 H ) , 3 . 02 - 2 . 80 ( m , 1 H ) , 2 . 17 ( dd , J = 11 . 2 , 2 . 3 Hz , 2 H ) , 1 . 55 ( s , 2 H ) , 1 . 03 ( s , 6 H ) .