[
  {
    "molid": "mol37116",
    "smiles": "ONc1c(O)ccc2ccccc12",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "ONc1c(O)ccc2ccccc12",
        "std_free_energy": -6.267911911010742,
        "relative_population": 0.9999961674387775
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "[O-]c1ccc2ccccc2c1NO",
        "std_free_energy": -1.9935178756713867,
        "relative_population": 0.9144731335449158
      },
      {
        "id": "-1_2",
        "charge": -1,
        "smiles": "[O-]Nc1c(O)ccc2ccccc12",
        "std_free_energy": 0.37599965929985046,
        "relative_population": 0.08552686645508414
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 6.40000009536743,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]