[
  {
    "molid": "mol13783",
    "smiles": "O=C1Cc2c1ccc(O)c2[N+](=O)[O-]",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=C1Cc2c1ccc(O)c2[N+](=O)[O-]",
        "std_free_energy": -0.8782268762588501,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=C1Cc2c1ccc([O-])c2[N+](=O)[O-]",
        "std_free_energy": -7.450726509094238,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 3.98,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "Datawarrior"
      }
    ]
  }
]