1. Department of Chemistry; University of Florida; 1600 SW Archer Road Gainesville FL 32610 USA
2. Department of Medicinal Chemistry; Center for Natural Products; Drug Discovery and Development (CNPD3); University of Florida; 1345 Center Drive Gainesville FL 32610 USA
3. Department of Molecular Genetics and Microbiology; University of Florida; Gainesville FL 32610 USA