1 H NMR ( 400 MHz , 클로로포름 - d ) δ 7 . 29 ( s , 1 H ) , 7 . 13 ( d , J = 15 . 0 Hz , 1 H ) , 5 . 26 ( dd , J = 50 . 9 , 21 . 6 Hz , 1 H ) , 4 . 82 ( d , J = 14 . 0 Hz , 1 H ) , 4 . 06 - 3 . 38 ( m , 6 H ) , 1 . 49 ( s , 9 H ) .