[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][C][C][=N][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Branch1][#Branch1][=C][Ring1][#Branch2][C][Ring1][=C][N]"}, {"from": "gpt", "value": "The molecule is an oral acetylcholinesterase inhibitor previously used for therapy of Alzheimer disease. Tacrine therapy is associated with a very high rate of serum aminotransferase elevations during therapy and has been linked to several instances of clinically apparent, acute liver injury."}]