1. Department of Medicinal Chemistry, School of Pharmacy, Xi’an Jiaotong University, Xi’an, Shaanxi 710061, PR China
2. College of Pharmacy, University of Michigan, NCRC, 1600 Huron Parkway, Ann Arbor, Michigan 48109, United States
3. Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi 710061, PR China