[
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    "microspecies": [
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        "data_source": "QSARToolbox"
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        "data_source": "AttenGpKa training set"
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        "pka_value": 1.02,
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        "data_source": "AttenGpKa training set"
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        "data_source": "AttenGpKa training set"
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    ]
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]