[
  {
    "molid": "mol35188",
    "smiles": "CCCC(C(=O)O)[As](=O)(O)O",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "CCC[C@H](C(=O)O)[As](=O)(O)O",
        "std_free_energy": -1.6480941772460938,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "CCC[C@H](C(=O)[O-])[As](=O)(O)O",
        "std_free_energy": -8.906868934631348,
        "relative_population": 0.7230312973711482
      },
      {
        "id": "-1_2",
        "charge": -1,
        "smiles": "CCC[C@H](C(=O)O)[As](=O)([O-])O",
        "std_free_energy": -7.947320938110352,
        "relative_population": 0.27696870262885176
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 3.0,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]