[
  {
    "molid": "mol4499",
    "smiles": "N#CCCn1cnc2ccccc21",
    "microspecies": [
      {
        "id": "0_1",
        "charge": 0,
        "smiles": "N#CCCn1cnc2ccccc21",
        "std_free_energy": -6.650763034820557,
        "relative_population": 1.0
      },
      {
        "id": "1_1",
        "charge": 1,
        "smiles": "N#CCCn1c[nH+]c2ccccc21",
        "std_free_energy": -3.049048900604248,
        "relative_population": 1.0
      }
    ],
    "macro_pka_values": [
      {
        "pka_value": 4.3,
        "charge_state_pre": 1,
        "charge_state_post": 0,
        "data_source": "IUPAC digitized pKa"
      }
    ]
  }
]