Ye, Xin-Shan; Sun, Fang; Liu, Min; Li, Qin; Wang, Yuhang; Zhang, Guisheng; Zhang, Li-He; Zhang, Xiao-Lian Journal of Medicinal Chemistry, 2005, vol. 48, # 11 p. 3688 - 3691 doi: 10.1021/jm050169t