1. 1The Department of Medicinal Chemistry, The Hebrew University of Jerusalem, P.O. Box 12065, Jerusalem 91120, Israel
2. 2Chorghade Enterprises, 14 Carlson Circle, Natick, MA 01760, USA
3. 3Research Laboratory of Gedeon Richter Ltd., P.O. Box 27, H-1475 Budapest 10, Hungary
4. 4The Department of Pharmaceutics, The School of Pharmacy, The Hebrew University of Jerusalem, P.O. Box 12065, Jerusalem 91120, Israel