[
  {
    "molid": "mol10657",
    "smiles": "CON=C1C=CC(=NO)C=C1C",
    "microspecies": [
      {
        "id": "0_2",
        "charge": 0,
        "smiles": "CON=C1C=CC(=NO)C=C1C",
        "std_free_energy": -7.069153785705566,
        "relative_population": 0.999994608538496
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "CON=C1C=CC(=N[O-])C=C1C",
        "std_free_energy": 0.13938896358013153,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 9.6,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "IUPAC digitized pKa"
      }
    ]
  }
]