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              "uuid": "4da93a18-ed74-40dc-8e99-b2cf0bfc2d9d",
              "refuuid": "2c4e83c6-61f2-41aa-8f16-7d65b2043096",
              "name": "CYSTEINESULFENIC ACID",
              "unii": "FB8KIA847T",
              "linking_id": "FB8KIA847T",
              "ref_pname": "CYSTEINESULFENIC ACID",
              "substance_class": "reference"
            },
            "residue_modified": "CYSTEINE",
            "structural_modification_type": "AMINO ACID SUBSTITUTION"
          }
        ]
      }
    }
  ]
}