Refactor the unstructured text into a valid JSON dictionary. The key names follow the Darwin Core Archive Standard. If a key lacks content, then insert an empty string. Fill in the following JSON structure as required: {"catalogNumber": "", "order": "", "family": "", "scientificName": "", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}
   J BENTH.   %LP Croton spruceanus   e^ P BRAZIL    1931-12  e.l% 1666 1557`486 =& u   Machado River region, source of the Jatuarana River  ow   malpighiales cA    +HT euphobiaceae   Croton F.vl$   k&H spruceanus   b.a. krukoff :R6  Mato Gross0 L    
{"catalogNumber": "1557486", "order": "Malpighiales", "family": "Euphorbiaceae", "scientificName": "Croton spruceanus", "scientificNameAuthorship": "Benth.", "genus": "Croton", "subgenus": "", "specificEpithet": "spruceanus", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "B.A. Krukoff", "recordNumber": "1666", "verbatimEventDate": "1931-12", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Brazil", "stateProvince": "Mato Grosso", "county": "", "municipality": "", "locality": "Machado River region, source of the Jatuarana River", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}