1. College of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China
2. Deparment of Medicinal Chemistry, Anhui Academy of Chinese Medicine, Hefei 230012, China
3. Anhui Province Key Laboratory of Research & Development of Chinese Medicine, Hefei 230012, China
4. Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 211198, China