[
  {
    "molid": "mol9039",
    "smiles": "NC(=O)CC([N+](=O)[O-])[N+](=O)[O-]",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "NC(=O)CC([N+](=O)[O-])[N+](=O)[O-]",
        "std_free_energy": -6.124563217163086,
        "relative_population": 1.0
      },
      {
        "id": "-1_2",
        "charge": -1,
        "smiles": "NC(=O)C[C-]([N+](=O)[O-])[N+](=O)[O-]",
        "std_free_energy": -6.8645806312561035,
        "relative_population": 0.9999870952986192
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 3.41,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "IUPAC digitized pKa"
      }
    ]
  }
]