[
  {
    "molid": "mol15455",
    "smiles": "O=C(O)CCC(=O)c1ccc(-c2ccccc2)cc1",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=C(O)CCC(=O)c1ccc(-c2ccccc2)cc1",
        "std_free_energy": -4.230080604553223,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=C([O-])CCC(=O)c1ccc(-c2ccccc2)cc1",
        "std_free_energy": -8.830192565917969,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 4.46,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "Datawarrior"
      },
      {
        "pka_value": 4.51,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "Organic Oxygen Acids and Nitrogen Bases"
      }
    ]
  }
]