[
  {
    "molid": "mol5309",
    "smiles": "NCCCS(=O)(=O)O",
    "microspecies": [
      {
        "id": "0_2",
        "charge": 0,
        "smiles": "[NH3+]CCCS(=O)(=O)[O-]",
        "std_free_energy": -11.824317932128906,
        "relative_population": 0.9999967462663756
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "NCCCS(=O)(=O)[O-]",
        "std_free_energy": -5.8305511474609375,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 10.05,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "IUPAC digitized pKa"
      }
    ]
  }
]