1. Institute
of Chemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 2, D-06120 Halle, Germany
2. Institute
of Chemistry, Chemnitz University of Technology, Straße der Nationen 62, D-09111 Chemnitz, Germany
3. Institute
of Chemistry, University of Kassel, Heinrich-Plett-Straße 40, D-34132 Kassel, Germany
4. Department
of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle, Germany