[
  {
    "molid": "mol38061",
    "smiles": "CP(CC(=O)O)CC(=O)O",
    "microspecies": [
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "CP(CC(=O)[O-])CC(=O)O",
        "std_free_energy": -8.461867332458496,
        "relative_population": 1.0
      },
      {
        "id": "-2_1",
        "charge": -2,
        "smiles": "CP(CC(=O)[O-])CC(=O)[O-]",
        "std_free_energy": -12.100408554077148,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 6.19000005722046,
        "charge_state_pre": -1,
        "charge_state_post": -2,
        "data_source": "QSARToolbox"
      }
    ]
  }
]