[{"from": "human", "value": "Describe this molecule. [C][O][C][=C][Branch2][Ring2][Branch1][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][C][Branch1][Branch1][C][Ring1][=Branch1][=O][C][C][C][C][N][Branch1][Branch1][C][C][Ring1][=Branch1][C][C][=C][C][=C][C][=C][Ring1][=Branch1][O][C]"}, {"from": "gpt", "value": "The molecule is an oral acetylcholinesterase inhibitor used for therapy of Alzheimer disease. Donepezil is associated with a minimal rate of serum enzyme elevations during therapy and has only rarely been implicated as a cause of clinically apparent liver injury."}]