1. Institute of Organic Chemistry; Johannes Gutenberg-University Mainz; Duesbergweg 10-14 55128 Mainz Germany
2. Graduate School Materials Science in Mainz; Staudingerweg 9 55128 Mainz Germany
3. Organic Chemistry Institute; Westfälische Wilhelms-University Münster; Corrensstrasse 40 48149 Münster Germany
4. Institute of Immunology, University Medical Center; Johannes Gutenberg-University Mainz; Langenbeckstrasse 1, Geb. 708 55101 Mainz Germany