[
  {
    "molid": "mol33604",
    "smiles": "CC[N+](CC)c1ccc(N=Nc2ccc(O)cc2)cc1",
    "microspecies": [],
    "macro_pka_values": [
      {
        "pka_value": -1.8,
        "charge_state_pre": 2,
        "charge_state_post": 1,
        "data_source": "OCHEM"
      }
    ]
  }
]