[
  {
    "molid": "mol35249",
    "smiles": "NCCC(=O)NCCC(=O)O",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "[NH3+]CCC(=O)NCCC(=O)[O-]",
        "std_free_energy": -11.348248481750488,
        "relative_population": 0.9999746047320168
      },
      {
        "id": "-1_2",
        "charge": -1,
        "smiles": "NCCC(=O)NCCC(=O)[O-]",
        "std_free_energy": -4.668327331542969,
        "relative_population": 0.9999169192646767
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 9.85999965667725,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]