1. School of Pharmaceutical Sciences, South-Central Minzu University, Wuhan 430074, P. R. China
2. College of Chemistry and Material Sciences, South-Central Minzu University, Wuhan 430074, P. R. China
3. Ethnopharmacology Level 3 Laboratory, National Administration of Traditional Chinese Medicine, Wuhan 430074, P. R. China
4. State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China