[
  {
    "molid": "mol20060",
    "smiles": "O=C(O)Cc1cccc2ccc(-c3ccccc3)cc12",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=C(O)Cc1cccc2ccc(-c3ccccc3)cc12",
        "std_free_energy": -3.9423322677612305,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=C([O-])Cc1cccc2ccc(-c3ccccc3)cc12",
        "std_free_energy": -8.975061416625977,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 6.9,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "Baltruschat ChEMBL"
      }
    ]
  }
]