[
  {
    "molid": "mol2510",
    "smiles": "O=[N+]([O-])c1ccc(NCc2cccc(Br)c2)c([N+](=O)[O-])c1",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "O=[N+]([O-])c1ccc(NCc2cccc(Br)c2)c([N+](=O)[O-])c1",
        "std_free_energy": -7.052920341491699,
        "relative_population": 1.0
      },
      {
        "id": "1_1",
        "charge": 1,
        "smiles": "O=[N+]([O-])c1ccc([NH2+]Cc2cccc(Br)c2)c([N+](=O)[O-])c1",
        "std_free_energy": 12.04403305053711,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": -5.49,
        "charge_state_pre": 1,
        "charge_state_post": 0,
        "data_source": "Hunt"
      }
    ]
  }
]