1. Institute of Organic Chemistry, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany
2. Department of Pharmacognosy, Faculty of Pharmacy, Ain-Shams University, Organization of African Unity Street 1, 11566 Cairo, Egypt
3. Federal Institute for Risk Assessment, Max-Dohrn-Straße 8-10, D-10589 Berlin, Germany
4. Centre National de Floristique, Conservatoire et Jardin Botaniques, Université d’Abidjan, Abidjan 08, Ivory Coast
5. Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan