1. Guangdong Province Key Laboratory of Pharmacodynamic Constituents of Traditional Chinese Medicine and New Drugs Research, Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University , Guangzhou , 510632 , P. R. China
2. Analytical and Testing Center, Jinan University , Guangzhou , 510632 , P. R. China
3. Guangdong Province Key Laboratory of Pharmacodynamic Constituents of Traditional Chinese Medicine and New Drugs Research, Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, School of Medicine, Guangzhou , 510632 , P. R. China