Kim, Dong-Hwan; Hong, Bin Na; Le, Hoa Thi; Hong, Ha Na; Lim, Choon Woo; Park, Keun Ha; Kim, Tae Woo; Kang, Tong Ho Bioorganic and Medicinal Chemistry Letters, 2012 , vol. 22, # 14 p. 4609 - 4612