[
  {
    "molid": "mol34292",
    "smiles": "O=C(Oc1cccc([N+](=O)[O-])c1)c1ccccc1O",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=C(Oc1cccc([N+](=O)[O-])c1)c1ccccc1O",
        "std_free_energy": -6.141486644744873,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=C(Oc1cccc([N+](=O)[O-])c1)c1ccccc1[O-]",
        "std_free_energy": -0.813379168510437,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 8.80000019073486,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]