[
  {
    "molid": "mol34274",
    "smiles": "CCP(=O)(CC)CCC(=O)O",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "CCP(=O)(CC)CCC(=O)O",
        "std_free_energy": -3.985093593597412,
        "relative_population": 1.0
      },
      {
        "id": "-1_3",
        "charge": -1,
        "smiles": "CCP(=O)(CC)CCC(=O)[O-]",
        "std_free_energy": -8.587270736694336,
        "relative_population": 0.9999988268939908
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 4.23000001907349,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]