1. Science and Technology Innovation Center Guangzhou University of Chinese Medicine Guangzhou 510405 P. R. China
2. Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics School of Traditional Chinese Medicine Southern Medical University Guangzhou 510515 P. R. China
3. Center for Bioactive Natural Molecules and Innovative Drugs Research and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research College of Pharmacy Jinan University Guangzhou 510632 P. R. China