[
  {
    "molid": "mol11921",
    "smiles": "Cc1ccc(O)c(N=Nc2ccc(S(=O)(=O)O)cc2)c1",
    "microspecies": [
      {
        "id": "-1_4",
        "charge": -1,
        "smiles": "Cc1ccc(O)c(N=Nc2ccc(S(=O)(=O)[O-])cc2)c1",
        "std_free_energy": -10.216968536376953,
        "relative_population": 0.9999275750789265
      },
      {
        "id": "-2_1",
        "charge": -2,
        "smiles": "Cc1ccc([O-])c(N=Nc2ccc(S(=O)(=O)[O-])cc2)c1",
        "std_free_energy": -2.190652370452881,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 8.75,
        "charge_state_pre": -1,
        "charge_state_post": -2,
        "data_source": "IUPAC digitized pKa"
      }
    ]
  }
]