[
  {
    "molid": "mol13471",
    "smiles": "O=[N+]([O-])c1ccc2[nH]c(CO)nc2c1",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=[N+]([O-])c1ccc2[nH]c(CO)nc2c1",
        "std_free_energy": -7.815100193023682,
        "relative_population": 1.0
      },
      {
        "id": "1_1",
        "charge": 1,
        "smiles": "O=[N+]([O-])c1ccc2[nH]c(CO)[nH+]c2c1",
        "std_free_energy": 1.9366806745529175,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 2.21,
        "charge_state_pre": 1,
        "charge_state_post": 0,
        "data_source": "Datawarrior"
      },
      {
        "pka_value": 2.21000003814697,
        "charge_state_pre": 1,
        "charge_state_post": 0,
        "data_source": "QSARToolbox"
      }
    ]
  }
]