[
  {
    "molid": "mol37246",
    "smiles": "C[C@H](C(=O)O)[C@H](C)C(=O)O",
    "microspecies": [
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "C[C@H](C(=O)[O-])[C@H](C)C(=O)O",
        "std_free_energy": -8.621339797973633,
        "relative_population": 1.0
      },
      {
        "id": "-2_1",
        "charge": -2,
        "smiles": "C[C@H](C(=O)[O-])[C@H](C)C(=O)[O-]",
        "std_free_energy": -10.559215545654297,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 3.92000007629395,
        "charge_state_pre": -1,
        "charge_state_post": -2,
        "data_source": "QSARToolbox"
      }
    ]
  }
]