[
  {
    "molid": "mol33668",
    "smiles": "SC1=CN=CC=[N+]1",
    "microspecies": [],
    "macro_pka_values": [
      {
        "pka_value": -0.73,
        "charge_state_pre": 2,
        "charge_state_post": 1,
        "data_source": "OCHEM"
      }
    ]
  }
]