[
  {
    "molid": "mol35307",
    "smiles": "C/C(C(=O)O)=C(/C)C(=O)O",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "C/C(C(=O)O)=C(/C)C(=O)O",
        "std_free_energy": 0.014278605580329895,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "C/C(C(=O)[O-])=C(/C)C(=O)O",
        "std_free_energy": -9.393232345581055,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 2.52999997138977,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]