[
  {
    "molid": "mol35992",
    "smiles": "O=C(O)C1CCc2nonc2C1",
    "microspecies": [
      {
        "id": "0_2",
        "charge": 0,
        "smiles": "O=C(O)[C@@H]1CCc2nonc2C1",
        "std_free_energy": -3.8931632041931152,
        "relative_population": 0.9490604150349395
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=C([O-])[C@@H]1CCc2nonc2C1",
        "std_free_energy": -9.474006652832031,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 4.03999996185303,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]