[
  {
    "molid": "mol34031",
    "smiles": "CCCc1c2c(c(O)c3c(=O)cc(C(=O)O)oc13)CCCC2",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "CCCc1c2c(c(O)c3c(=O)cc(C(=O)O)oc13)CCCC2",
        "std_free_energy": -0.3560306131839752,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "CCCc1c2c(c(O)c3c(=O)cc(C(=O)[O-])oc13)CCCC2",
        "std_free_energy": -10.485958099365234,
        "relative_population": 0.998696515180535
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 1.92999994754791,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]