[
  {
    "molid": "mol12329",
    "smiles": "O=C1c2ccccc2C(=O)C1c1ccc(C2C(=O)c3ccccc3C2=O)c2ccccc12",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=C1c2ccccc2C(=O)C1c1ccc(C2C(=O)c3ccccc3C2=O)c2ccccc12",
        "std_free_energy": -2.5299901962280273,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=C1c2ccccc2C(=O)[C-]1c1ccc(C2C(=O)c3ccccc3C2=O)c2ccccc12",
        "std_free_energy": -4.612133026123047,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 3.68,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "IUPAC digitized pKa"
      }
    ]
  }
]