[
  {
    "molid": "mol32454",
    "smiles": "O=C(O)C=CC(O)=CC(=O)CC(=O)O",
    "microspecies": [
      {
        "id": "-4_1",
        "charge": -4,
        "smiles": "O=C([O-])C=CC([O-])=CC(=O)[CH-]C(=O)[O-]",
        "std_free_energy": 3.980553150177002,
        "relative_population": 1.0
      },
      {
        "id": "-3_2",
        "charge": -3,
        "smiles": "O=C([O-])C=CC([O-])=CC(=O)[CH-]C(=O)O",
        "std_free_energy": -1.6246540546417236,
        "relative_population": 0.05243878554981584
      },
      {
        "id": "-3_3",
        "charge": -3,
        "smiles": "O=C([O-])C=CC([O-])=CC(=O)CC(=O)[O-]",
        "std_free_energy": -4.510395050048828,
        "relative_population": 0.9395372766507731
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 10.5,
        "charge_state_pre": -3,
        "charge_state_post": -4,
        "data_source": "OCHEM"
      }
    ]
  }
]