[
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        "id": "-1_1",
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    ],
    "macro_pka_values": [
      {
        "pka_value": 2.0,
        "charge_state_pre": 0,
        "charge_state_post": -1,
        "data_source": "QSARToolbox"
      },
      {
        "pka_value": 7.0,
        "charge_state_pre": -2,
        "charge_state_post": -3,
        "data_source": "IUPAC digitized pKa"
      },
      {
        "pka_value": 9.27,
        "charge_state_pre": -3,
        "charge_state_post": -4,
        "data_source": "IUPAC digitized pKa"
      },
      {
        "pka_value": 2.6,
        "charge_state_pre": -1,
        "charge_state_post": -2,
        "data_source": "IUPAC digitized pKa"
      },
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        "pka_value": 2.59999990463257,
        "charge_state_pre": -1,
        "charge_state_post": -2,
        "data_source": "QSARToolbox"
      }
    ]
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]