1. Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P.R. China
2. Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, P.R. China
3. College of Pharmacy, Guangxi Zhuang Yao Medicine Center of Engineering and Technology, Guangxi University of Chinese Medicine, Nanning 530200, P.R. China