1. a Department of Organic Chemistry, Faculty of Chemical Engineering and Technology , University of Zagreb , Zagreb, HR‐10000, Croatia
2. b Center for Radiopharmaceutical Science of ETH, PSI and USZ , Villigen PSI, 5232, Switzerland
3. c Rega Institute for Medical Research , Katholieke Universiteit Leuven , Leuven, Minderbroedersstraat 10, Leuven, B‐3000, Belgium
4. d Department of Chemistry and Applied Biosciences ETH , Institute of Pharmaceutical Sciences , Winterthurerstr. 190, Zürich, CH‐8057, Switzerland