1. Department of Chemistry; Faculty of Exact Sciences; Bar-Ilan University; Ramat Gan 5290002 Israel
2. Department of Pharmacology; and the Lineberger Comprehensive Cancer Center; University of North Carolina at Chapel Hill; Chapel Hill NC 27599 USA
3. Felsenstein Medical Research Center; Sackler Faculty of Medicine; Tel-Aviv University; Rabin Medical Center-Beilinson Campus Petah Tikva 49100 Israel
4. The Skin Research Institute; The Dead Sea & Arava Science Center; Tamar Regional Council; Dead Sea Mobile Post 86910 Israel
5. Jiangsu Key Laboratory of Drug Design and Optimization; Department of Medicinal Chemistry; School of Pharmacy; China Pharmaceutical University Nanjing; Jiangsu 210008 P. R. China