1. The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, China
2. Guangdong Provincial Key Laboratory of Research and Development of Natural Drugs, and School of Pharmacy, Guangdong Medical University, Dongguan, China
3. College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, P.R. China
4. Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China