[{"from": "human", "value": "Generate a molecule based on this description. The molecule is an ammonium ion resulting from the protonation of the tertiary amino group of tetrahydroalstonine. The major microspecies at pH 7.3. It is a conjugate acid of a tetrahydroalstonine."}, {"from": "gpt", "value": "[C][C@H1][C@@H1][C][NH1+1][C][C][C][=C][Branch2][Ring1][Branch1][C@@H1][Ring1][=Branch1][C][C@@H1][Ring1][#Branch2][C][=Branch1][Branch1][=C][O][Ring1][=C][C][=Branch1][C][=O][O][C][N][C][=C][C][=C][C][=C][Ring2][Ring1][Ring1][Ring1][=Branch1]"}]