[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C@@H1][C][N][C][C@H1][Ring1][=Branch1][C][=C][C][=N][C][=C][N][=C][Ring1][=Branch1][C][=C][Ring1][#C][Ring1][#Branch2]"}, {"from": "gpt", "value": "The molecule is an organic heterotetracyclic compound that acts as a partial agonist for nicotinic cholinergic receptors and is used (in the form of its tartate salt) as an aid to giving up smoking. It has a role as a nicotinic acetylcholine receptor agonist and a serotonergic agonist. It is a secondary amino compound, an organic heterotetracyclic compound and a bridged compound. It is a conjugate base of a varenicline(1+)."}]