1. Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, P.O. Box 26170, Greensboro, North Carolina 27402, United States
2. Department of Pharmaceutical Sciences, BRITE, North Carolina Central University, Durham, North Carolina 27707, United States
3. Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27109, United States
4. Natural Products Laboratory, Research Triangle Institute, Research Triangle Park, North Carolina 27709, United States
5. Mycosynthetix, Inc., 505 Meadowlands Drive, Suite 103, Hillsborough, North Carolina 27278, United States