[
  {
    "molid": "mol11259",
    "smiles": "CCOC(=O)C(=O)C(CC)C(=O)OCC",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "CCOC(=O)C(=O)[C@H](CC)C(=O)OCC",
        "std_free_energy": -5.891726493835449,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "CCOC(=O)C(=O)[C-](CC)C(=O)OCC",
        "std_free_energy": 3.370157480239868,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 6.89,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "IUPAC digitized pKa"
      }
    ]
  }
]