1. Division of Pharmacognosy, Department of Medicinal Chemistry, Uppsala University, Biomedical Centre, Box 574, SE-75123 Uppsala, Sweden
2. Department of Chemistry, Faculty of Science, El-Menoufia University, 32512 Shebin El-Kom, Egypt
3. Department of Clinical Neuroscience, Karolinska Institutet (KI), Stockholm, Sweden
4. Ecologial Chemistry Group, Department of Chemistry, School of Chemical Science and Technology, Stockholm, Sweden
5. Section of Metabolomics, Institute of Biology, Leiden University, Box 9502, 2300 RA Leiden, The Netherlands