Biochem/physiol Actions Potent and selective neuronal nicotinic acetylcholine receptor (nAChR) agonist. Caution Hygroscopic Legal Information Manufactured and sold under exclusive license from Abbott Laboratories. Application The 5-125I-analog has been used as a selective radioligand for the α4β2 nAChR subtype. Fluorinated analogs have been used for PET imaging of nAChRs.