1. Department of Chemistry, Ben‐Gurion University of the Negev, P.O. Box 653, Beer Sheva, 84105, Israel, Fax: (+972) 7‐647‐2943
2. Department of Chemical Engineering, UMIST, P.O. Box 88, Manchester M60 1QD, United Kingdom
3. Institut für Pharmakognosie der Universität Innsbruck, Josef‐Moeller‐Haus, Innrain 52, 6020 Innsbruck, Austria