[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an organic cation that is the conjugate acid of legionaminic acid obtained by protonation of both amino groups and deprotonation of the carboxy group; major species at pH 7.3. It is an organic cation and an ammonium ion derivative. It is a conjugate acid of a legionaminic acid."}, {"from": "gpt", "value": "[C][C@H1][Branch2][Ring1][#C][C@H1][Branch2][Ring1][#Branch2][C@H1][C@@H1][Branch2][Ring1][Ring2][C@H1][Branch1][S][C][C@][Branch1][Ring2][O][Ring1][=Branch1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O][O][NH3+1][NH3+1][O]"}]