1. State Key Laboratory of Applied Organic Chemistry, Lanzhou University, No. 222 South Tianshui Road, Lanzhou 730000, People’s Republic of China
2. School of Pharmacy, Lanzhou University, No. 199 West Donggang Road, Lanzhou 730000, People’s Republic of China
3. School of Pharmaceutical Science, Hengyang Medical School, University of South China, Hengyang 421001, People’s Republic of China