Positive allosteric modulator of α7 neuronal nicotinic acetylcholine receptors (EC50 = 216 nM), with no detectable effect on α4β2, α3β4 and α9α10 receptors. Active in vivo following systemic administration. Neuroprotective in an in vivo model of transient focal cerebral ischemia. Purity 99%. MW (observed): 311.72