1. Leibniz Institut für Katalyse e. V. an der; Universität Rostock; Albert-Einstein-Straße 29a 18055 Rostock Germany
2. Research and Development, Process Research; DSM Nutritional Products, P.O. Box 2676; 4002 Basel Switzerland
3. DSM Ahead R&d-Innovative Synthesis, P.O. Box 18; 6160 MD Geleen The Netherlands