Dong, Yizhou; Nakagawa-Goto, Kyoko; Lai, Chin-Yu; Morris-Natschke, Susan L.; Bastow, Kenneth F.; Lee, Kuo-Hsiung Bioorganic and Medicinal Chemistry Letters, 2011, vol. 21, # 8 p. 2341 - 2344 doi: 10.1016/j.bmcl.2011.02.084