1. Laboratory for Organic Synthesis of
Functional Systems, Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, D-12489 Berlin, Germany
2. Leibniz-Institut für Molekulare Pharmakologie (FMP), Robert-Rössle-Strasse
10, D-13125 Berlin, Germany
3. Department of Physics, Humboldt-Universität zu Berlin, Newton Strasse
15, D-12489 Berlin, Germany
4. Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 7, NL-9747 AG
Groningen, The Netherlands