[
  {
    "molid": "mol25781",
    "smiles": "O=C(O)N1C=NN(C(=O)O)C=N1",
    "microspecies": [
      {
        "id": "0_2",
        "charge": 0,
        "smiles": "O=C(O)N1C=NN(C(=O)O)C=N1",
        "std_free_energy": 0.6119840741157532,
        "relative_population": 0.9999408691742477
      },
      {
        "id": "-1_2",
        "charge": -1,
        "smiles": "O=C([O-])N1C=NN(C(=O)O)C=N1",
        "std_free_energy": -8.771051406860352,
        "relative_population": 0.9999984619975373
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 2.8,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "AttenGpKa training set"
      }
    ]
  }
]