[
  {
    "molid": "mol11772",
    "smiles": "O=S(=O)(O)c1ccc(O)c(N=Nc2ccccc2)c1",
    "microspecies": [
      {
        "id": "-1_3",
        "charge": -1,
        "smiles": "O=S(=O)([O-])c1ccc(O)c(N=Nc2ccccc2)c1",
        "std_free_energy": -6.950272560119629,
        "relative_population": 0.9806248795280614
      },
      {
        "id": "-2_1",
        "charge": -2,
        "smiles": "O=S(=O)([O-])c1ccc([O-])c(N=Nc2ccccc2)c1",
        "std_free_energy": -4.716706275939941,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 7.53,
        "charge_state_pre": -1,
        "charge_state_post": -2,
        "data_source": "IUPAC digitized pKa"
      }
    ]
  }
]