[
  {
    "molid": "mol32383",
    "smiles": "O=C(O)C=NO",
    "microspecies": [
      {
        "id": "-1_2",
        "charge": -1,
        "smiles": "O=C([O-])C=NO",
        "std_free_energy": -10.718240737915039,
        "relative_population": 0.9996172757905072
      },
      {
        "id": "-2_1",
        "charge": -2,
        "smiles": "O=C([O-])C=N[O-]",
        "std_free_energy": -2.1033735275268555,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 10.23,
        "charge_state_pre": -1,
        "charge_state_post": -2,
        "data_source": "OCHEM"
      }
    ]
  }
]