[
  {
    "molid": "mol37759",
    "smiles": "O=C(O)[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)[C@@H](O)C(=O)O",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=C(O)[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)[C@@H](O)C(=O)O",
        "std_free_energy": -1.415170431137085,
        "relative_population": 1.0
      },
      {
        "id": "-1_2",
        "charge": -1,
        "smiles": "O=C([O-])[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)[C@@H](O)C(=O)O",
        "std_free_energy": -8.281896591186523,
        "relative_population": 0.9992618894060761
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 3.25,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]