1. School of Pharmacy; Lanzhou University; Lanzhou P.R. China
2. Natural Products Research Laboratories; UNC Eshelman School of Pharmacy, University of North Carolina; Chapel Hill North Carolina
3. Environmental and Municipal Engineering School; Lanzhou Jiaotong University; Lanzhou P.R. China
4. State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou P.R. China
5. Chinese Medicine Research and Development Center; China Medical University and Hospital; Taichung Taiwan