[
  {
    "molid": "mol34196",
    "smiles": "O=C(O)C1OC(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)O[C@@H]1C(=O)O",
        "std_free_energy": 4.946954727172852,
        "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)O[C@@H]1C(=O)O",
        "std_free_energy": -3.9123032093048096,
        "relative_population": 0.3951151477782539
      },
      {
        "id": "-1_3",
        "charge": -1,
        "smiles": "O=C(O)[C@@H]1[C@@H](C(=O)O)[C@H](C(=O)O)O[C@@H]1C(=O)[O-]",
        "std_free_energy": -4.290674686431885,
        "relative_population": 0.5768306444320621
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 0.949999988079071,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]