Complex sentence: Varenicline displays full agonism on α 7 nicotinic acetylcholine receptors and is a partial agonist on the α 4 β 2, α 3 β 4, and α 6 β 2 subtypes.
Split into simpler sentences: Varenicline displays full agonism on α 7 nicotinic acetylcholine receptors. And it is a partial agonist on the α 4 β 2, α 3 β 4, and α 6 β 2 subtypes.