[
  {
    "molid": "mol37578",
    "smiles": "O=C1C(Br)=CC(=Nc2ccc(O)c(S(=O)(=O)O)c2)C=C1Br",
    "microspecies": [
      {
        "id": "-1_3",
        "charge": -1,
        "smiles": "O=C1C(Br)=CC(=Nc2ccc(O)c(S(=O)(=O)[O-])c2)C=C1Br",
        "std_free_energy": -10.793533325195312,
        "relative_population": 0.9992666885190484
      },
      {
        "id": "-2_1",
        "charge": -2,
        "smiles": "O=C1C(Br)=CC(=Nc2ccc([O-])c(S(=O)(=O)[O-])c2)C=C1Br",
        "std_free_energy": -3.2221083641052246,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 6.07000017166138,
        "charge_state_pre": -1,
        "charge_state_post": -2,
        "data_source": "QSARToolbox"
      }
    ]
  }
]