2. Academic Validation
  3. Iridoid glucosides in the endemic Picconia azorica (Oleaceae)

Iridoid glucosides in the endemic Picconia azorica (Oleaceae)

  • Phytochemistry. 2015 Jul:115:171-4. doi: 10.1016/j.phytochem.2015.01.010.
Chrysoula Gousiadou 1,  Tetsuo Kokubun 2,  José Martins 3,  Charlotte H Gotfredsen 1,  Søren R Jensen 4
Affiliations

Affiliations

  • 1 Department of Chemistry, The Technical University of Denmark, Build. 201, DK-2800 Lyngby, Denmark.
  • 2 Jodrell Laboratory, Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3DS, UK.
  • 3 Department of Biology, University of the Azores, 9501-801 Ponta Delgada, Portugal.
  • 4 Department of Chemistry, The Technical University of Denmark, Build. 201, DK-2800 Lyngby, Denmark. Electronic address: [email protected].
PMID: 25687603 DOI: 10.1016/j.phytochem.2015.01.010
Abstract

In our continued investigation of Plants from the family Oleaceae we have now investigated Picconia azorica endemic to the Azores. Like most species within the family it contains the oleoside-based secoiridoid glucosides ligstroside and oleuropein as the main compounds and in addition verbascoside and echinacoside. As with the previously investigated Picconia excelsa, it also contained the carbocyclic iridoid glucosides involved in the biosynthetic pathway to the oleoside derivatives. However, while P. excelsa contained loganin esterified with some monoterpenoid acids, P. azorica contains similar esters of 7-epi-loganic acid named Picconioside A and B. In addition were found the two 7-O-E/Z-cinnamoyl esters of 7-epi-loganic acid named Picconioside C and D.

Keywords

Chemotaxonomy; Iridoid glucosides; Oleaceae; Phenylethanoid glucosides; Picconia azorica L; Secoiridoid glucosides.

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