1. School of Pharmaceutical Sciences and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming, Yunnan 650500, People’s Republic of China
2. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, People’s Republic of China
3. Faculty of Science, Kunming University of Science and Technology, 727 South Jingming Road, Chenggong District, Kunming 650500, People’s Republic of China