[
  {
    "molid": "mol34370",
    "smiles": "O=C1C=C(O)C(O)O1",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=C1C=C(O)[C@H](O)O1",
        "std_free_energy": -2.45566987991333,
        "relative_population": 1.0
      },
      {
        "id": "-1_2",
        "charge": -1,
        "smiles": "O=C1C=C([O-])[C@H](O)O1",
        "std_free_energy": -7.393946647644043,
        "relative_population": 0.9997389823229793
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 4.36999988555908,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]