[
  {
    "molid": "mol37459",
    "smiles": "O=C(O)[C@H](O)[C@H](O)[C@H](O)CO",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=C(O)[C@H](O)[C@H](O)[C@H](O)CO",
        "std_free_energy": -3.390836238861084,
        "relative_population": 1.0
      },
      {
        "id": "-1_4",
        "charge": -1,
        "smiles": "O=C([O-])[C@H](O)[C@H](O)[C@H](O)CO",
        "std_free_energy": -10.33034610748291,
        "relative_population": 0.9999973745285639
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 4.01999998092651,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]