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    "microspecies": [
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        "id": "3_1",
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    ],
    "macro_pka_values": [
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        "pka_value": 9.81,
        "charge_state_pre": 1,
        "charge_state_post": 0,
        "data_source": "Baltruschat ChEMBL"
      },
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        "pka_value": 8.74,
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        "charge_state_post": 1,
        "data_source": "Baltruschat ChEMBL"
      },
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        "pka_value": 7.85,
        "charge_state_pre": 3,
        "charge_state_post": 2,
        "data_source": "Baltruschat ChEMBL"
      }
    ]
  }
]