[
  {
    "molid": "mol34346",
    "smiles": "O=C(NO)c1ccccc1C(=O)NO",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=C(NO)c1ccccc1C(=O)NO",
        "std_free_energy": -5.835238933563232,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=C(N[O-])c1ccccc1C(=O)NO",
        "std_free_energy": -2.07766056060791,
        "relative_population": 0.6006355834769502
      },
      {
        "id": "-1_2",
        "charge": -1,
        "smiles": "O=C([N-]O)c1ccccc1C(=O)NO",
        "std_free_energy": -1.6695464849472046,
        "relative_population": 0.39936441652304977
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 9.60000038146973,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]