[
  {
    "molid": "mol37383",
    "smiles": "Oc1c(O)c(Cl)c(O)c(O)c1Cl",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "Oc1c(O)c(Cl)c(O)c(O)c1Cl",
        "std_free_energy": -3.77028751373291,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "[O-]c1c(O)c(Cl)c(O)c(O)c1Cl",
        "std_free_energy": -3.54752779006958,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 6.40000009536743,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]