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": ""}
  16850 2SK[   QCE EXCOECARIA OPPOSITIFOLIA VAR. CRENULATA  5A C. J. Saldanha  9M7w` oppositifolia      6- grenulata  1644635 ^[F  UTTARAKHAND 6h    ;qa excoecaria    =Ma @ India   P6Q dehradun (wight) chakrab. & m.gangop. .   D5  VANAGUR VAR. 5c,`k    
{"catalogNumber": "1644635", "order": "", "family": "", "scientificName": "Excoecaria oppositifolia var. crenulata", "scientificNameAuthorship": "(Wight) Chakrab. & M.Gangop.", "genus": "Excoecaria", "subgenus": "", "specificEpithet": "oppositifolia", "verbatimTaxonRank": "var.", "infraspecificEpithet": "crenulata", "identifiedBy": "", "recordedBy": "C. J. Saldanha", "recordNumber": "16850", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "India", "stateProvince": "Uttarakhand", "county": "Dehradun", "municipality": "", "locality": "Vanagur", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}