[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is the doubly positive charged ammonium ion obtained from protonation of the four amino groups and deprotonation of the phosphate OH groups of kanamycin A 3'-phosphate; major species at pH 7.3. It is a conjugate acid of a kanamycin A 3'-phosphate."}, {"from": "gpt", "value": "[C][C@H1][Branch2][=Branch1][=Branch1][C@@H1][Branch2][Ring2][N][C@H1][Branch2][Ring2][#Branch1][C@@H1][Branch1][Branch1][C@H1][Ring1][=Branch1][NH3+1][O][C@@H1][C@@H1][Branch2][Ring1][=Branch2][C@H1][Branch1][=N][C@@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][NH3+1][O][O][P][=Branch1][C][=O][Branch1][C][O-1][O-1][O][O][O][C@@H1][C@@H1][Branch1][P][C@H1][Branch1][=N][C@@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][O][O][NH3+1][O][NH3+1]"}]