[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is polycationic form of chitosan arising from global protonation of the 2-amino groups; major species at pH 7.3. It is a conjugate acid of a chitosan."}, {"from": "gpt", "value": "[C][Branch2][Ring1][Branch1][C@@H1][C@H1][Branch1][S][C@@H1][Branch1][N][C@H1][Branch1][Branch2][C@@H1][Branch1][Ring2][O][Ring1][=Branch1][O][NH3+1][O][O][O]"}]