[
  {
    "molid": "mol37114",
    "smiles": "O=C(O)/C=C\\C(=O)NO",
    "microspecies": [
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=C([O-])/C=C\\C(=O)NO",
        "std_free_energy": -10.015698432922363,
        "relative_population": 0.9995493501066949
      },
      {
        "id": "-2_1",
        "charge": -2,
        "smiles": "O=C([O-])/C=C\\C(=O)[N-]O",
        "std_free_energy": -2.491015911102295,
        "relative_population": 0.4189305079203724
      },
      {
        "id": "-2_2",
        "charge": -2,
        "smiles": "O=C([O-])/C=C\\C(=O)N[O-]",
        "std_free_energy": -2.8179354667663574,
        "relative_population": 0.5809267130764815
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 9.14999961853027,
        "charge_state_pre": -1,
        "charge_state_post": -2,
        "data_source": "QSARToolbox"
      }
    ]
  }
]