1 H NMR ( 400 MHz , 클로로포름 - d ) δ 7 . 21 ( d , J = 14 . 5 Hz , 2 H ) , 5 . 23 ( ddd , J = 53 . 9 , 7 . 0 , 3 . 6 Hz , 1 H ) , 4 . 84 ( d , J = 27 . 9 Hz , 1 H ) , 4 . 04 ( dt , J = 15 . 3 , 9 . 5 Hz , 1 H ) , 3 . 99 - 3 . 59 ( m , 3 H ) , 2 . 73 ( s , 2 H ) , 1 . 50 ( s , 9 H ) .