Kern, Jeffrey C.; Terefenko, Eugene A.; Fensome, Andrew; Unwalla, Ray; Wrobel, Jay; Cohen, Jeffrey; Zhu, Yuan; Berrodin, Thomas J.; Yudt, Matthew R.; Winneker, Richard C.; Zhang, Zhiming; Zhang, Puwen Bioorganic and Medicinal Chemistry Letters, 2008 , vol. 18, # 18 p. 5015 - 5017