1 H NMR ( 400 MHz , CDCl 3 ) δ 5 . 49 - 5 . 36 ( br s , 1 H ) , 4 . 49 - 4 . 36 ( m , 1 H ) , 4 . 05 ( AB 사 중선 , JAB = 14 . 6 Hz , Δν AB = 38 . 1 Hz , 2 H ) , 4 . 04 - 3 . 96 ( m , 1 H ) , 3 . 85 ( ddd , J = 12 . 1 , 11 . 3 , 3 . 1 Hz , 1 H ) , 2 . 70 - 2 . 59 ( m , 1 H ) , 1 . 92 - 1 . 78 ( m , 1 H ) , 1 . 41 ( s , 9 H ) .