1. School of Pharmacy & State Key Laboratory of Applied Organic Chemistry & Collaborative Innovation Center for Northwestern Chinese Medicine, Lanzhou University, Room 609, Xinglin Building, 222 Tianshui South Road, Chengguan District, Lanzhou 730000, China
2. School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing 400044, China