[
  {
    "molid": "mol38601",
    "smiles": "O=c1[nH]c(=O)n(-c2ccccc2)o1",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=c1[nH]c(=O)n(-c2ccccc2)o1",
        "std_free_energy": -3.8017735481262207,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=c1[n-]c(=O)n(-c2ccccc2)o1",
        "std_free_energy": -7.82383918762207,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 4.32999992370606,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]