[
  {
    "molid": "mol37365",
    "smiles": "O=N/C=N/O",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=N/C=N/O",
        "std_free_energy": -3.9947781562805176,
        "relative_population": 1.0
      },
      {
        "id": "1_1",
        "charge": 1,
        "smiles": "O=N/C=[NH+]/O",
        "std_free_energy": 5.334439277648926,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 5.09999990463257,
        "charge_state_pre": 1,
        "charge_state_post": 0,
        "data_source": "QSARToolbox"
      }
    ]
  }
]