[
  {
    "molid": "mol35588",
    "smiles": "Cc1ccc(OC(=O)CC(=O)O)cc1",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "Cc1ccc(OC(=O)CC(=O)O)cc1",
        "std_free_energy": -3.080500602722168,
        "relative_population": 1.0
      },
      {
        "id": "-1_2",
        "charge": -1,
        "smiles": "Cc1ccc(OC(=O)CC(=O)[O-])cc1",
        "std_free_energy": -10.300397872924805,
        "relative_population": 0.999927477490949
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 3.00999999046326,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]