[
  {
    "molid": "mol32038",
    "smiles": "Oc1nnnn1Cc1ccc2ccccc2c1",
    "microspecies": [
      {
        "id": "0_2",
        "charge": 0,
        "smiles": "Oc1nnnn1Cc1ccc2ccccc2c1",
        "std_free_energy": -3.5175113677978516,
        "relative_population": 0.9999999034042237
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "[O-]c1nnnn1Cc1ccc2ccccc2c1",
        "std_free_energy": -8.129341125488281,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 6.36,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "OCHEM"
      }
    ]
  }
]