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  "meta": {
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      "uuid": "d5c23274-af2d-445a-811a-b58f92775243",
      "version": "7",
      "modifications": {
        "uuid": "4bf63087-c241-4860-8f1c-86f885f808f6",
        "structural_modifications": [
          {
            "uuid": "08c16eeb-f014-42e7-bb93-729ae08f373c",
            "extent": "COMPLETE",
            "molecular_fragment": {
              "uuid": "9c5bc6d5-fc6b-4b66-8361-ebb13978a4f9",
              "refuuid": "2a5095e0-5b0c-47f7-b8f3-3d3ac9967382",
              "name": "POTASSIUM CATION",
              "unii": "295O53K152",
              "linking_id": "295O53K152",
              "ref_pname": "POTASSIUM CATION",
              "substance_class": "reference"
            },
            "structural_modification_type": "MOIETY"
          }
        ]
      },
      "unii": "01DMT14Z63"
    }
  ]
}