1. State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Chinese Academy of Sciences 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park Shanghai 201203 P.R. China
2. University of Chinese Academy of Sciences No. 19 A Yuquan Road Beijing 100049 P.R. China
3. Shandong Laboratory of Yantai Drug Discovery Bohai Rim Advanced Research Institute for Drug Discovery Yantai Shandong 264117 P.R. China