1. Department of Medicinal Chemistry, Royal Danish School of Pharmacy, Universitetsparken 2, DK-2100 Copenhagen, Denmark, Institute of Pharmacy, Freie Universität Berlin, Kelchstrasse 31, D-12169 Berlin, Germany, Medicinal Plants Unit, Isfahan Research Centre of Natural Resources and Animal Science, Isfahan, P.O. Box 81785-114, Islamic Republic of Iran, and Bruker Daltonik GmbH, Fahrenheitstrasse 4, D-28359 Bremen, Germany