1. Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Pharmacy, Yunnan University, Kunming, 650091, P. R. China
2. Animal Research and Resource Center, School of Life Sciences, Yunnan University, Kunming, 650091, P. R. China
3. First Affiliated Hospital of Kunming Medical University, Kunming 650032, P. R. China