DPA-713

DPA-713 or N,''N-diethyl-2--5,7-dimethylpyrazolopyrimidine-3-acetamide is a selective ligand for the translocator protein.
The binding affinity of DPA-713 for TSPO is reported as K''_i = 4.7 ± 0.2 nM.
DPA-713 has been radiolabelled with carbon-11 as a potential radiotracer for imaging the TSPO using positron emission tomography. Radiation dosimetry and biodistribution of DPA-713 have been assessed in healthy volunteers, indicating that DPA-713 is a suitable radiotracer for imaging the TSPO in humans.