[
  {
    "molid": "mol33740",
    "smiles": "C=C1C[C@@]23C[C@@]1(O)CC[C@@H]2[C@]12C=C[C@@H](O)[C@](C)(C(=O)O1)[C@@H]2[C@H]3C(=O)O",
    "microspecies": [],
    "macro_pka_values": [
      {
        "pka_value": 4.0,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "OCHEM"
      }
    ]
  }
]