Dang, Hung The; Kang, Gyeoung Jin; Yoo, Eun Sook; Hong, Jongki; Choi, Jae Sue; Kim, Hyung Sik; Chung, Hae Young; Jung, Jee H. Bioorganic and Medicinal Chemistry, 2011 , vol. 19, # 4 p. 1520 - 1527