1. Department of Organic Chemistry III/Macromolecular Chemistry; Ulm University; Albert-Einstein-Allee 11 89081 Ulm Germany
2. Institut für Quantenoptik; Ulm University; Albert-Einstein-Allee 11 89081 Ulm Germany
3. Institute of Pharmacology of Natural Products and Clinical Pharmacology; Ulm University; Helmholtzstr. 20 89081 Ulm Germany
4. Physikalisches Institut; University of Stuttgart; 70569 Stuttgart Germany
5. Research Center for Knowledge Communities; University of Tsukuba; 1-2 Kasuga Tsukuba Ibaraki 305-8550 Japan
6. Institute of Pharmacology and Toxicology; University of Ulm Medical Center; Albert-Einstein-Allee 11 89081 Ulm Germany