[
  {
    "molid": "mol10921",
    "smiles": "O=C(O)C(O)(C(=O)O)C1CCCCC1",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=C(O)C(O)(C(=O)O)C1CCCCC1",
        "std_free_energy": -1.9264860153198242,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=C([O-])C(O)(C(=O)O)C1CCCCC1",
        "std_free_energy": -9.979124069213867,
        "relative_population": 1.0
      },
      {
        "id": "-2_1",
        "charge": -2,
        "smiles": "O=C([O-])C(O)(C(=O)[O-])C1CCCCC1",
        "std_free_energy": -12.256534576416016,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 2.62,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "IUPAC digitized pKa"
      },
      {
        "pka_value": 4.78,
        "charge_state_pre": -1,
        "charge_state_post": -2,
        "data_source": "IUPAC digitized pKa"
      }
    ]
  }
]