– THK-5470(THK 5470), a monoamine oxidase-B (MAO-B) imaging probe, could be used for neurological diseases study. THK-5470 shows remarkably high binding affinity against MAO-B with an IC50 value of 4.2 nM, low binding affinity against tau with an IC50 value of 4462 nM. THK-5470 has high selective binding property and high affinity (from patent EP2019-846498).