1. Department of Food Science and Engineering, Foshan University, Foshan 528231, P.R. China
2. 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
3. Guangdong Institute of Analysis, Guangzhou 510070, P.R. China