1. Institute of Biophysics University of Natural Resources and Life Sciences Vienna Austria
2. Department of Chemistry University of Helsinki Helsinki Finland
3. USDA Forest Service Southern Research Station Auburn Alabama
4. Institute of Organic Chemistry University of Natural Resources and Life Sciences Vienna Austria
5. Institute of Chemistry of Renewable Resources University of Natural Resources and Life Sciences Vienna Austria
6. Department of Natural and Microbial Products Chemistry National Research Centre Giza Egypt
7. Institute of Biologically Inspired Materials University of Natural Resources and Life Sciences Vienna Austria