1. N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia, Institute for Biological Sciences, National Research Council Canada, Ottawa, K1A 0R6, Canada, Institute of Plant Diseases and Plant Protection, University of Hannover, D-30167 Hannover, Germany, and Research Center Borstel, Center for Medicine and Biosciences, D-23845 Borstel, Germany