Orthosteric neuronal nicotinic acetylcholine receptor (nAChR) antagonist (IC50 values are 0.17, 0.25, 0.4, 4.8, 6.5, 8.2, 20 and 34 μM at α3β4, α1β1εδ, α3β4β3, α6β4β3, α7, α4β2, α3β2β3 and α6/3β2β3 receptors respectively). Attenuates nicotine-evoked dopamine release from the ventral tegmental area in vivo (IC50 = 0.2 nM) and reduces nicotine self-administration in rats. Brain penetrant.