1. Center for Bioactive Natural Molecules and Innovative Drugs Research College of Pharmacy Jinan University Guangzhou 510632 P. R. China
2. Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research Jinan University Guangzhou 510632 P. R. China
3. Science and Technology Innovation Center Guangzhou University of Chinese Medicine Guangzhou 510405 P. R. China