1. Department of Chemistry, National University of Singapore, 3 Science Drive 3,
Singapore 117543, Singapore
2. Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, China
3. Division of Molecular Pharmaceutics,
Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United
States
4. Department of Biochemistry,
Yong Loo Lin School of Medicine, National University of Singapore, National University Health System, 8 Medical
Drive, Singapore 117597, Singapore