1. Key Laboratory of Alternative Technologies for Fine Chemicals Process, Institute of Applied Chemistry, Shaoxing University, Shaoxing, Zhejiang Province 312000, People's Republic of China
2. School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang Province 325035, People's Republic of China
3. State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Bioactive Natural Product Research, Department of Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, P. R. China