PK14105 has been evaluated biologically as a potential radioligand for positron emission tomography (PET) studies targeting peripheral benzodiazepine binding sites (PBBS) receptors. When administered to rats with unilaterally lesioned striata, PK14105 was observed to quickly cross the blood-brain barrier, displaying significant radioactivity retention in the lesioned striatum, in contrast to the unlesioned striatum or cerebellar vermis. Additionally, PK14105 has the capability to inhibit receptor ligands, calcium channel ligands, and co-transporters in all salivary glands.