[
  {
    "molid": "mol36174",
    "smiles": "O=C(O)CN1CCOCCOCCN(CC(=O)O)CC(=O)Nc2ccccc2NC(=O)C1",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=C([O-])C[NH+]1CCOCCOCC[NH+](CC(=O)[O-])CC(=O)Nc2ccccc2NC(=O)C1",
        "std_free_energy": -11.74732494354248,
        "relative_population": 0.9811687362658849
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=C([O-])CN1CCOCCOCC[NH+](CC(=O)[O-])CC(=O)Nc2ccccc2NC(=O)C1",
        "std_free_energy": -12.777806282043457,
        "relative_population": 0.9946706590588442
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 5.1399998664856,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]