[
  {
    "molid": "mol9305",
    "smiles": "O=C1CCC=C1O",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=C1CCC=C1O",
        "std_free_energy": -4.9922099113464355,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=C1CCC=C1[O-]",
        "std_free_energy": -2.1297948360443115,
        "relative_population": 0.5951262612435342
      },
      {
        "id": "-1_2",
        "charge": -1,
        "smiles": "O=C1C[CH-]C=C1O",
        "std_free_energy": -1.6829469203948975,
        "relative_population": 0.38066726416419266
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 9.14,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "IUPAC digitized pKa"
      }
    ]
  }
]