[
  {
    "molid": "mol32248",
    "smiles": "O=[N+]([O-])c1ccc2c(O)[nH]nc2c1",
    "microspecies": [
      {
        "id": "0_2",
        "charge": 0,
        "smiles": "O=[N+]([O-])c1ccc2c(O)[nH]nc2c1",
        "std_free_energy": -4.993488311767578,
        "relative_population": 0.9999929654935992
      },
      {
        "id": "-1_1",
        "charge": -1,
        "smiles": "O=[N+]([O-])c1ccc2c([O-])[nH]nc2c1",
        "std_free_energy": -2.6825931072235107,
        "relative_population": 0.9521385968104327
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 6.52,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "OCHEM"
      }
    ]
  }
]