[
  {
    "molid": "mol18693",
    "smiles": "O=S(=O)(O)c1ccc(Nc2c3ccccc3nc3ccccc23)cc1",
    "microspecies": [
      {
        "id": "0_2",
        "charge": 0,
        "smiles": "O=S(=O)([O-])c1ccc(Nc2c3ccccc3[nH+]c3ccccc23)cc1",
        "std_free_energy": -10.167160987854004,
        "relative_population": 0.8422924125533062
      },
      {
        "id": "0_3",
        "charge": 0,
        "smiles": "O=S(=O)([O-])c1ccc([NH2+]c2c3ccccc3nc3ccccc23)cc1",
        "std_free_energy": -8.49067211151123,
        "relative_population": 0.15753353573913137
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=S(=O)([O-])c1ccc(Nc2c3ccccc3nc3ccccc23)cc1",
        "std_free_energy": -7.038463592529297,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 6.87,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "Baltruschat ChEMBL"
      }
    ]
  }
]