Results and Conclusion
 Radiolabelling was achieved in ~20-25 % yield decay corrected to end of synthesis after purification. Intermediates, precursor and reference compound were fully characterized by 1H-NMR, 19F-NMR, 13C-NMR and HRMS. In vitro binding study showed IC50 value of 29.1±1.6 nM and 29.7±5.8 nM towards GSK-3α and GSK-3α β, respectively.