1. Institute of Pharmacy, Department of Pharmacognosy, Leopold-Franzens University of Innsbruck, Innrain 52, Josef-Moeller-Haus, A-6020 Innsbruck, Austria, Institute of Pharmacy, Department of Chemistry, Computer Aided Molecular Design Group, Leopold-Franzens University of Innsbruck, Innrain 52, Josef-Moeller-Haus, A-6020 Innsbruck, Austria, and Inte:Ligand GmbH Software-Engineering and Consulting, Clemens Maria Hofbauergasse 6, A-2344 Maria Enzersdorf, Austria