[
  {
    "molid": "SM26",
    "smiles": "CC(=O)NS(=O)(=O)CCc1ccccc1",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "CC(=O)NS(=O)(=O)CCc1ccccc1",
        "std_free_energy": -5.2000579833984375,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "CC(=O)[N-]S(=O)(=O)CCc1ccccc1",
        "std_free_energy": -9.61110782623291,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 4.91,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "SAMPL7"
      }
    ]
  }
]