[
  {
    "molid": "mol34425",
    "smiles": "O=C(O)C1C(C(=O)O)C(C(=O)O)C1C(=O)O",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=C(O)[C@H]1[C@@H](C(=O)O)[C@@H](C(=O)O)[C@H]1C(=O)O",
        "std_free_energy": 2.974864959716797,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=C([O-])[C@H]1[C@@H](C(=O)O)[C@@H](C(=O)O)[C@H]1C(=O)O",
        "std_free_energy": -5.054296493530273,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 2.51999998092651,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]