[
  {
    "molid": "mol21916",
    "smiles": "C1=Cc2ccccc2C1",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "C1=Cc2ccccc2C1",
        "std_free_energy": -6.410937309265137,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "c1ccc2[cH-]ccc2c1",
        "std_free_energy": 3.6309666633605957,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 18.2,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "AttenGpKa training set"
      }
    ]
  }
]