비선광도 [ α ] D 20 - 51 . 5 ( c = 1 . 61 , 메탄올 ) ; 광학 순도 : 99 . 1 % ee ( HPLC ) ; 1 H NMR ( CDCl 3 , ppm ) δ 2 . 87 ( brs , 4 H ) , 3 . 67 ( m , 2 H ) , 3 . 72 ( s , 3 H ) , 4 . 92 ( s , 1 H ) , 6 . 66 ( d , 1 H , J = 5 . 4 ㎐), 7 . 05 ( d , 1 H , J = 5 . 4 ㎐), 7 . 26 ( m , 2 H ) , 7 . 40 ( m , 1 H ) , 7 . 70 ( m , 1 H )