[
  {
    "molid": "mol31781",
    "smiles": "Sc1nc2ccccc2s1",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "Sc1nc2ccccc2s1",
        "std_free_energy": -5.5118865966796875,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "[S-]c1nc2ccccc2s1",
        "std_free_energy": -3.9298253059387207,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 6.93,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "OCHEM"
      }
    ]
  }
]