[
  {
    "molid": "mol37306",
    "smiles": "O=C(O)[C@H]1C[C@@H](O)[C@@H](O)[C@H](O)C1",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=C(O)[C@H]1C[C@@H](O)[C@@H](O)[C@H](O)C1",
        "std_free_energy": -4.282454490661621,
        "relative_population": 1.0
      },
      {
        "id": "-1_3",
        "charge": -1,
        "smiles": "O=C([O-])[C@H]1C[C@@H](O)[C@@H](O)[C@H](O)C1",
        "std_free_energy": -9.344854354858398,
        "relative_population": 0.9999998994153543
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 4.3899998664856,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]