[
  {
    "molid": "mol10580",
    "smiles": "COc1cc(C=O)cc([N+](=O)[O-])c1O",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "COc1cc(C=O)cc([N+](=O)[O-])c1O",
        "std_free_energy": -1.9173460006713867,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "COc1cc(C=O)cc([N+](=O)[O-])c1[O-]",
        "std_free_energy": -6.518126010894775,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 4.2,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "IUPAC digitized pKa"
      }
    ]
  }
]