Oon Han, Hee; Hae Kim, Seung; Kim, Kyoung-Hee; Hur, Gwong-Cheung; Joo Yim, Hyeon; Chung, Hee-Kyung; Ho Woo, Sung; Dong Koo, Ki; Lee, Chang-Seok; Sung Koh, Jong; Tae Kim, Geun Bioorganic and Medicinal Chemistry Letters, 2007, vol. 17, # 4 p. 937 - 941 doi: 10.1016/j.bmcl.2006.11.050