[
  {
    "molid": "mol3766",
    "smiles": "O=[N+]([O-])c1cccc(-c2ccncc2)c1",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=[N+]([O-])c1cccc(-c2ccncc2)c1",
        "std_free_energy": -5.703400611877441,
        "relative_population": 1.0
      },
      {
        "id": "1_1",
        "charge": 1,
        "smiles": "O=[N+]([O-])c1cccc(-c2cc[nH+]cc2)c1",
        "std_free_energy": -1.1992056369781494,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 4.9,
        "charge_state_pre": 1,
        "charge_state_post": 0,
        "data_source": "OCHEM"
      }
    ]
  }
]