[
  {
    "molid": "mol38545",
    "smiles": "OCCC(Cl)Cl",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "OCCC(Cl)Cl",
        "std_free_energy": -7.439627170562744,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "[O-]CCC(Cl)Cl",
        "std_free_energy": 9.322092056274414,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 12.8900003433228,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]