[
  {
    "molid": "mol10938",
    "smiles": "O=C(O)c1cc2cc([N+](=O)[O-])ccc2[nH]1",
    "microspecies": [
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=C([O-])c1cc2cc([N+](=O)[O-])ccc2[nH]1",
        "std_free_energy": -10.651833534240723,
        "relative_population": 0.9999932083774424
      },
      {
        "id": "-2_1",
        "charge": -2,
        "smiles": "O=C([O-])c1cc2cc([N+](=O)[O-])ccc2[n-]1",
        "std_free_energy": 3.4707021713256836,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 14.91,
        "charge_state_pre": -1,
        "charge_state_post": -2,
        "data_source": "IUPAC digitized pKa"
      }
    ]
  }
]