[
  {
    "molid": "mol32970",
    "smiles": "O=C(O)C(=O)C(O)C(=O)O",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=C(O)C(=O)[C@H](O)C(=O)O",
        "std_free_energy": 1.079529047012329,
        "relative_population": 1.0
      },
      {
        "id": "-1_3",
        "charge": -1,
        "smiles": "O=C([O-])C(=O)[C@H](O)C(=O)O",
        "std_free_energy": -8.330597877502441,
        "relative_population": 0.31853417794418043
      },
      {
        "id": "-1_4",
        "charge": -1,
        "smiles": "O=C(O)C(=O)[C@H](O)C(=O)[O-]",
        "std_free_energy": -9.084393501281738,
        "relative_population": 0.6769012526768029
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 1.1,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "OCHEM"
      }
    ]
  }
]