1. Department of Pharmaceutical Chemistry Faculty of Life Sciences University of Vienna Althanstrasse 14 Vienna 1090 Austria
2. Department of Chemistry University of Torino Via P. Giuria 7 Torino 10125 Italy
3. Department of Chemistry Rutgers University 73 Warren Street Newark NJ 07102 United States
4. Department of Chemistry Wroclaw University F. Joliot-Curie 14 Wroclaw 50383 Poland