1 Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, PO Box 26170, Greensboro, NC, 27402-6170, USA. Electronic address: haraja@uncg.edu.
2 Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, PO Box 26170, Greensboro, NC, 27402-6170, USA. Electronic address: nicholas_oberlies@uncg.edu.
3 Department of Microbial Drugs, Helmholtz Centre for Infection Research, Inhoffenstrasse 7, 38124, Braunschweig, Germany. Electronic address: marc.stadler@helmholtz-hzi.de.