( 1 ) 1 H - NMR ( 500 ㎒, CDCl 3 , 내부 표준 TMS , δ in ppm ) : 1 . 53 ( s , 3 H ) , 1 . 72 ( m , 2 H ) , 1 . 93 ( d , 3 H ) , 2 . 41 - 2 . 60 ( m , 4 H ) , 2 . 84 - 2 . 90 ( m , 4 H ) , 5 . 53 ( q , 1 H ) , 6 . 05 ( d , 1 H )