Kim, Dong Jin; Seo, Kyung Jae; Lee, Kyung Seok; Shin, Kye Jung; Yoo, Kyung Ho; Kim, Dong Chan; Park, Sang Woo Bioorganic and Medicinal Chemistry Letters, 2000, vol. 10, # 24 p. 2799 - 2802 doi: 10.1016/S0960-894X(00)00575-8