1 H NMR ( 400 MHz , 클로로포름 - d ) δ 7 . 19 - 7 . 08 ( m , 2 H ) , 6 . 53 - 6 . 40 ( m , 2 H ) , 4 . 49 ( t , J = 6 . 3 Hz , 2 H ) , 4 . 36 ( s , 2 H ) , 3 . 50 ( s , 1 H ) , 3 . 18 ( dd , J = 11 . 0 , 2 . 5 Hz , 2 H ) , 3 . 00 ( s , 2 H ) , 2 . 84 ( d , J = 10 . 7 Hz , 2 H ) , 2 . 75 ( s , 1 H ) , 1 . 72 - 1 . 47 ( m , 4 H ) .