[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is an organic cation obtained by protonation of the secondary amino function of 3-(methylaminomethyl)indole; major species at pH 7.3. It is an ammonium ion derivative and an organic cation."}, {"from": "gpt", "value": "[C][NH2+1][C][C][=C][N][C][=C][C][=C][C][=C][Ring1][=Branch1][Ring1][=Branch2]"}]