[
  {
    "molid": "mol32487",
    "smiles": "O=C1CC(C(=O)O)C(C(=O)O)O1",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=C1C[C@H](C(=O)O)[C@@H](C(=O)O)O1",
        "std_free_energy": 2.6801199913024902,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=C1C[C@H](C(=O)O)[C@@H](C(=O)[O-])O1",
        "std_free_energy": -8.031155586242676,
        "relative_population": 0.692708465535644
      },
      {
        "id": "-1_3",
        "charge": -1,
        "smiles": "O=C1C[C@H](C(=O)[O-])[C@@H](C(=O)O)O1",
        "std_free_energy": -7.190819263458252,
        "relative_population": 0.29894897397941256
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 2.26,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "OCHEM"
      }
    ]
  }
]