[{"from": "human", "value": "Provide a brief overview of this molecule. [C][N][C@H1][C][C][C@@H1][Ring1][Branch1][C@H1][Branch1][Branch2][C][=Branch1][C][=O][C][Ring1][Branch2][C][=Branch1][C][=O][O][C]"}, {"from": "gpt", "value": "The molecule is the methyl ester of (1R,2R,5S)-8-methyl-3-oxo-8-azabicyclo[3.2.1]octane-2-carboxylic acid (ecgonone). It is a tropane alkaloid, a cyclic ketone, a methyl ester, an organic heterobicyclic compound and a tertiary amino compound. It is a conjugate base of an ecgononium methyl ester(1+)."}]