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PNU-120596, also known as NSC 216666, is α7 nicotinic acetylcholine receptor positive allosteric modulator. PNU-120596 reverses a sub-chronic phencyclidine-induced cognitive deficit in the attentional set-shifting task in female rats. PNU-120596 augments the effects of donepezil on learning and memory in aged rodents and non-human primates.