title: Iridoid glucosides in the endemic Picconia azorica (Oleaceae).
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.
authors: Department of Chemistry, The Technical University of Denmark, Build. 201, DK-2800 Lyngby, Denmark.
authors: Chrysoula
authors: C
authors: Gousiadou
authors: Jodrell Laboratory, Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3DS, UK.
authors: Tetsuo
authors: T
authors: Kokubun
authors: Department of Biology, University of the Azores, 9501-801 Ponta Delgada, Portugal.
authors: José
authors: J
authors: Martins
authors: Department of Chemistry, The Technical University of Denmark, Build. 201, DK-2800 Lyngby, Denmark.
authors: Charlotte H
authors: CH
authors: Gotfredsen
authors: Department of Chemistry, The Technical University of Denmark, Build. 201, DK-2800 Lyngby, Denmark. Electronic address: srj@kemi.dtu.dk.
authors: Søren R
authors: SR
authors: Jensen
mesh_terms: D001394:Azores; D005960:Glucosides; D006027:Glycosides; D057888:Iridoid Glucosides / Q000737:chemistry / Q000302:isolation & purification*; D039823:Iridoids; D015394:Molecular Structure; D029592:Oleaceae / Q000737:chemistry*; D010636:Phenols; D011714:Pyrans; D059808:Polyphenols
chemical_list: D005960:Glucosides; D006027:Glycosides; D057888:Iridoid Glucosides; D039823:Iridoids; D010636:Phenols; D011714:Pyrans; C002947:loganic acid; C002769:oleuropein; C058956:acteoside; D059808:Polyphenols; C445380:ligstroside; C059516:loganin; C060297:echinacoside
keywords: Chemotaxonomy; Iridoid glucosides; Oleaceae; Phenylethanoid glucosides; Picconia azorica L; Secoiridoid glucosides