[
  {
    "molid": "mol32492",
    "smiles": "O=C(O)C=CC(=O)CC(=O)CC(=O)O",
    "microspecies": [
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=C([O-])C=CC(=O)CC(=O)CC(=O)O",
        "std_free_energy": -6.947810173034668,
        "relative_population": 0.46366416155649287
      },
      {
        "id": "-1_3",
        "charge": -1,
        "smiles": "O=C(O)C=CC(=O)CC(=O)CC(=O)[O-]",
        "std_free_energy": -7.01996374130249,
        "relative_population": 0.49835569481225067
      },
      {
        "id": "-2_6",
        "charge": -2,
        "smiles": "O=C([O-])C=CC(=O)CC(=O)CC(=O)[O-]",
        "std_free_energy": -10.367039680480957,
        "relative_population": 0.9865746356478136
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 3.5999999,
        "charge_state_pre": -1,
        "charge_state_post": -2,
        "data_source": "OCHEM"
      }
    ]
  }
]