1. Department of Chemistry, National University of Singapore, 117543 Singapore
2. Department of Pharmacy, National University of Singapore, 117543 Singapore
3. Department of Microbiology and Immunology, University of Otago, Dunedin 9054, New Zealand
4. Center for Discovery and Innovation, Hackensack Meridian Health & Department of Medical Sciences, Hackensack Meridian School of Medicine, Nutley, NJ 071110, USA
5. Department of Microbiology and Immunology, Georgetown University, Washington, DC, USA