[
  {
    "molid": "mol32458",
    "smiles": "CCN=C(N=[N+]=[N-])c1ccccc1O",
    "microspecies": [],
    "macro_pka_values": [
      {
        "pka_value": 9.3999996,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "OCHEM"
      }
    ]
  }
]