[
  {
    "molid": "mol37145",
    "smiles": "O=P(O)(O)C(P(=O)(O)O)P(=O)(O)O",
    "microspecies": [
      {
        "id": "-4_1",
        "charge": -4,
        "smiles": "O=P([O-])([O-])C(P(=O)([O-])O)P(=O)([O-])O",
        "std_free_energy": -14.610998153686523,
        "relative_population": 0.5741731965823634
      },
      {
        "id": "-4_3",
        "charge": -4,
        "smiles": "O=P([O-])([O-])C(P(=O)([O-])[O-])P(=O)(O)O",
        "std_free_energy": -14.312082290649414,
        "relative_population": 0.4258193622117547
      },
      {
        "id": "-3_3",
        "charge": -3,
        "smiles": "O=P([O-])(O)C(P(=O)([O-])O)P(=O)([O-])O",
        "std_free_energy": -13.9994535446167,
        "relative_population": 0.6881615350006993
      },
      {
        "id": "-3_4",
        "charge": -3,
        "smiles": "O=P([O-])([O-])C(P(=O)([O-])O)P(=O)(O)O",
        "std_free_energy": -13.207676887512207,
        "relative_population": 0.3117641406632353
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 6.46000003814697,
        "charge_state_pre": -3,
        "charge_state_post": -4,
        "data_source": "QSARToolbox"
      }
    ]
  }
]