[
  {
    "molid": "mol36370",
    "smiles": "O=Cc1cc(C(=O)O)c2cccccc1-2",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=Cc1cc(C(=O)O)c2cccccc1-2",
        "std_free_energy": -2.593243360519409,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=Cc1cc(C(=O)[O-])c2cccccc1-2",
        "std_free_energy": -9.149712562561035,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 4.51000022888184,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]