[
  {
    "molid": "mol36986",
    "smiles": "ON=C(O)C(=NO)c1ccccc1",
    "microspecies": [
      {
        "id": "0_4",
        "charge": 0,
        "smiles": "ON=C(O)C(=NO)c1ccccc1",
        "std_free_energy": -7.227154731750488,
        "relative_population": 0.9999997461595843
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      {
        "id": "-1_1",
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        "smiles": "[O-]N=C(O)C(=NO)c1ccccc1",
        "std_free_energy": -2.3443856239318848,
        "relative_population": 0.2014015654172044
      },
      {
        "id": "-1_3",
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        "smiles": "[O-]C(=NO)C(=NO)c1ccccc1",
        "std_free_energy": -3.435906171798706,
        "relative_population": 0.5999349908714031
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      {
        "id": "-1_4",
        "charge": -1,
        "smiles": "[O-]N=C(C(O)=NO)c1ccccc1",
        "std_free_energy": -2.330646276473999,
        "relative_population": 0.19865336182471718
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    ],
    "macro_pka_values": [
      {
        "pka_value": 6.67999982833862,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]