Jew, Sang-Sup; Park, Boon-Saeng; Lim, Doo-Yeon; Kim, Myoung Goo; Chung, In Kwon; Kim, Joo Hee; Hong, Chung Il; Kim, Joon-Kyum; Park, Hong-Jun; Lee, Jun-Hee; Park, Hyeung-Geun Bioorganic and Medicinal Chemistry Letters, 2003 , vol. 13, # 4 p. 609 - 612