Kim, Semi; Park, Ji Hyun; Koo, Sun-Young; Kim, Jung In; Kim, Min-Hyeung; Kim, Ji Eun; Jo, Kiwon; Geun Choi, Hwan; Lee, Sung Bae; Jung, Sang-Hun Bioorganic and Medicinal Chemistry Letters, 2004 , vol. 14, # 24 p. 6075 - 6078