[
  {
    "molid": "mol10023",
    "smiles": "CCCCC(C)C(=O)O",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "CCCC[C@H](C)C(=O)O",
        "std_free_energy": -4.327568531036377,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "CCCC[C@H](C)C(=O)[O-]",
        "std_free_energy": -8.708772659301758,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 5.04,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "IUPAC digitized pKa"
      }
    ]
  }
]