[
  {
    "molid": "mol1658",
    "smiles": "Nc1cc([N+](=O)[O-])ccc1Cl",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "Nc1cc([N+](=O)[O-])ccc1Cl",
        "std_free_energy": -7.27296257019043,
        "relative_population": 1.0
      },
      {
        "id": "1_1",
        "charge": 1,
        "smiles": "[NH3+]c1cc([N+](=O)[O-])ccc1Cl",
        "std_free_energy": 6.113368034362793,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 0.64,
        "charge_state_pre": 1,
        "charge_state_post": 0,
        "data_source": "IUPAC digitized pKa"
      },
      {
        "pka_value": 0.639999985694885,
        "charge_state_pre": 1,
        "charge_state_post": 0,
        "data_source": "QSARToolbox"
      }
    ]
  }
]