[
  {
    "molid": "mol9852",
    "smiles": "O=c1cccc2[nH]snc1-2",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=c1cccc2[nH]snc1-2",
        "std_free_energy": -5.527774333953857,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=c1cccc2[n-]snc1-2",
        "std_free_energy": -4.909881591796875,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 7.86,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "IUPAC digitized pKa"
      }
    ]
  }
]