Affiliation: | 1. Institute of Nuclear Chemistry, Johannes Gutenberg‐University, , Mainz, Germany;2. Institute of Organic Chemistry, Johannes Gutenberg‐University, , Mainz, Germany;3. Max Planck Institute for Polymer Research, , 55128 Mainz, Germany;4. Department of Nuclear Medicine, University Medical Center Mainz, , Mainz, Germany;5. Institute of Physiology, University of Halle, , Halle, Germany |