1. Department of Medicinal Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, P. R. China
2. University of Chinese Academy of Sciences, Beijing, P. R. China
3. Division of Antitumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, P. R. China
4. Hangzhou Institute for Advanced Study (UCAS), Hangzhou, P. R. China