[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][C][N][C][C][Ring1][=Branch1][C][=C][C][=N][C][=C][N][=C][Ring1][=Branch1][C][=C][Ring1][#C][Ring1][#Branch2]"}, {"from": "gpt", "value": "The molecule is a partial agonist of the nicotinic acetylcholine receptor and is used to help in smoking cessation. Varenicline has been associated with a low rate of serum enzyme elevations during therapy and, since approval and its widescale use, with rare instances of clinically apparent mild liver injury."}]