1. Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27402, United States
2. Mycosynthetix, Inc., Hillsborough, North Carolina 27278, United States
3. Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, Illinois 60612, United States
4. Department of Biological Sciences, Vanderbilt University, Nashville, Tennessee 37235, United States