Kang, Yong Koo; Shin, Kye Jung; Yoo, Kyung Ho; Seo, Kyung Jae; Hong, Chang Yong; Lee, Chang-Seok; Park, Seung Yong; Kim, Dong Jin; Park, Sang Woo Bioorganic and Medicinal Chemistry Letters, 2000, vol. 10, # 2 p. 95 - 99 doi: 10.1016/S0960-894X(99)00646-0