1. Department of Medicinal Chemistry and Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, Florida 32610, United States
2. Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
3. Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, Florida 32610, United States
4. Smithsonian Marine Station, Fort Pierce, Florida 34949, United States