1. Institute of Pharmaceutical Chemistry, University of Innsbruck, Innrain 52a, A-6020 Innsbruck, Austria
2. Institute of Hygiene/Ludwig-Boltzmann Institute for AIDS-Research, University of Innsbruck, Fritz-Pregl-Strasse 3, A-6020 Innsbruck, Austria
3. Institute of Mineralogy, Crystallography and Structural Chemistry, Technical University of Vienna, Getreidemarkt 9, A-1060 Vienna, Austria