[
  {
    "molid": "mol15860",
    "smiles": "O=C/C(O)=C\\O",
    "microspecies": [
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=C/C(O)=C\\[O-]",
        "std_free_energy": -7.397339820861816,
        "relative_population": 0.9786312917354402
      },
      {
        "id": "-2_1",
        "charge": -2,
        "smiles": "O=C/C([O-])=C\\[O-]",
        "std_free_energy": 7.48911190032959,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 13.0,
        "charge_state_pre": -1,
        "charge_state_post": -2,
        "data_source": "Datawarrior"
      }
    ]
  }
]