1. University of Vienna, Department of Pharmaceutical Chemistry, Vienna, Austria
2. Kurt Kitzing GmbH, Hinterm Alten Schloss 21, Wallerstein, Germany
3. USDA-ARS, Subtropical Horticulture Research Station, Miami, FL, USA
4. USDA-ARS, Center for Medical, Agricultural, and Veterinary Entomology, Gainesville, FL, USA