Zhang, Rui; Wang, Aihua; DeAngelis, Alan; Pelton, Patricia; Xu, Jun; Zhu, Peifang; Zhou, Lubing; Demarest, Keith; Murray, William V.; Kuo, Gee-Hong Bioorganic and Medicinal Chemistry Letters, 2007 , vol. 17, # 14 p. 3855 - 3859