1. Georg-August-Universität GöttingenInstitute of Organic and Biomolecular Chemistry Tammannstr. 2 37077 Göttingen Germany
2. Technische Universität BraunschweigInstitute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
3. Max Planck Institute for Dynamics and Self Organization Am Faßberg 17 37077 Göttingen Germany