[
  {
    "molid": "mol37461",
    "smiles": "O=C(O)C(=O)[C@@H](O)[C@H](O)[C@H](O)CO",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=C(O)C(=O)[C@@H](O)[C@H](O)[C@H](O)CO",
        "std_free_energy": -2.2648823261260986,
        "relative_population": 1.0
      },
      {
        "id": "-1_4",
        "charge": -1,
        "smiles": "O=C([O-])C(=O)[C@@H](O)[C@H](O)[C@H](O)CO",
        "std_free_energy": -10.831395149230957,
        "relative_population": 0.9998143651232874
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 2.96000003814697,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]