Walsh, Shawn P.; Severino, Alexandra; Zhou, Changyou; He, Jiafang; Liang, Gui-Bai; Tan, Carina P.; Cao, Jin; Eiermann, George J.; Xu, Ling; Salituro, Gino; Howard, Andrew D.; Mills, Sander G.; Yang, Lihu Bioorganic and Medicinal Chemistry Letters, 2011, vol. 21, # 11 p. 3390 - 3394 doi: 10.1016/j.bmcl.2011.03.114