1. Center for Heterocyclic Compounds Department of Chemistry University of Florida Gainesville FL USA
2. Department of Biochemistry Medical College of Wisconsin Milwaukee WI USA
3. Program in Chemical Biology Medical College of Wisconsin Milwaukee WI USA
4. Department of Entomology and Nematology U.C. Davis Comprehensive Cancer Center University of California Davis Davis CA USA
5. Chemistry Department Faculty of Science King Adbulaziz University Jeddah Saudi Arabia