Qian, Yimin; Ahmad, Mushtaq; Chen, Shaoqing; Gillespie, Paul; Le, Nam; Mennona, Frank; Mischke, Steven; So, Sung-Sau; Wang, Hong; Burghardt Charles; Tannu, Shahid; Conde-Knape, Karin; Kochan, Jarema; Bolin, David Bioorganic and Medicinal Chemistry Letters, 2011 , vol. 21, # 21 p. 6264 - 6269