[
  {
    "molid": "mol36120",
    "smiles": "O=C(O)CC[As](=O)(O)O",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=C(O)CC[As](=O)(O)O",
        "std_free_energy": -1.748393177986145,
        "relative_population": 1.0
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=C(O)CC[As](=O)([O-])O",
        "std_free_energy": -8.399746894836426,
        "relative_population": 0.549021096977614
      },
      {
        "id": "-1_2",
        "charge": -1,
        "smiles": "O=C([O-])CC[As](=O)(O)O",
        "std_free_energy": -8.203030586242676,
        "relative_population": 0.4509789030223859
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 3.73000001907349,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      }
    ]
  }
]