1. School of Chinese Materia Medica Nanjing University of Chinese Medicine 138 Xianlin Avenue Nanjing 210023 P. R. China
2. State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica Chinese Academy of Sciences 555 Zu Chong Zhi Road Shanghai 201203 P. R. China
3. School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences Hangzhou 310024 P. R. China