광학 순도 99 . 1 % ee ( HPLC ) ; 1 H NMR ( CDCl 3 , ppm ) δ 3 . 02 ( brs , 2 H ) , 3 . 27 ( m , 1 H ) , 3 . 45 ( m , 1 H ) , 4 . 14 ( m , 2 H ) , 5 . 18 ( s , 1 H ) , 6 . 65 ( m , 1 H ) , 7 . 24 ( m , 1 H ) , 7 . 41 ( m , 1 H ) , 7 . 86 ( m , 1 H )