1. School of Pharmacy, Lanzhou University, West Donggang Road. No. 199, Lanzhou 730000, China
2. School of Pharmaceutical Science, Hengyang Medical School, University of South China, West Changsheng Road. No. 28, Hengyang 421001, China
3. State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China