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Structure type: monomer
Trivial name: cornin
Compound class: glycoside
Contained glycoepitopes: IEDB_142488,IEDB_146664,IEDB_983931,SB_192

• Article ID: 11474
  Krull RE, Stermitz FR "Trans-fused iridoid glycosides from Penstemon mucronatus" - Phytochemistry 49(8) (1998) 2413-2415
  

  Two new trans-fused iridoid glycosides (5 alpha H)-6 alpha-8-epidihydrocornin and (5 alpha H)-6 alpha-8-hydroxy-8-epiloganin, were isolated from Penstemon mucronatus, along with cornin, penstemoside and three hastato-sides. The trans-fused iridoids are only the second and third known among over 900 described cis-fused iridoid glycosides. Two pairs of iridoids, identical except for the stereochemistry at C-8, were found. Structures were determined by spectroscopic methods.

  isolation, taxonomy, Scrophulariaceae, iridoid glycosides, Penstemon mucronatus

  Publication DOI: 10.1016/S0031-9422(98)00349-5
  Journal NLM ID: 0151434
  Publisher: Elsevier
  Institutions: Department of Chemistry, Colorado State University, Fort Collins, US
  Methods: 13C NMR, 1H NMR, HPLC, extraction, HMQC, HR-FAB-MS, VLC, optica rotation measurement
  
   
  
  Penstemon mucronatus
  CSDB ID 62099 (all data & tools)
• Article ID: 12048
  Calvo MI, Crespo A, Fernández M "Seasonal variations of the iridoids, flavonoids and verbascoside content from Verbena officinalis L" - Acta Horticulture 516(516) (2000) 169-176
  

  The aim of this work is the quantitative determinations of iridoids, flavonoids and verbascoside by HPLC in leaves of Verbena officinalis during three vegetative periods. The effects of plant age, date of harvest, type of soil, climate, as well as a comparision between two different locations, Ilundain and Lezaun, are been investigated in order to evaluate the development and content of major compounds in Verbena leaves, verbenalin mainly, because it is the active principle. The highest amount of iridoids and flavonoids was found in the leaves during the pre-flowering period. After flowering the total compound content in the leaves decreases, whereas verbascoside content increases. The amount of iridoids and phenolic components are increasing by the years. Verbenalin content is greater in Lezaun than in Ilundain every vegetative cycle.

  HPLC, flavonoids, Verbenaceae, verbascoside, Iridoids, Verbena officinalis, experimental field, verbenalin

  Publication DOI: 10.17660/ActaHortic.2000.516.20
  Institutions: Institut de pharmacognosie et phytochimie, Ecole de Pharmacie, Université de Lausanne, Lausanne, Switzerland, Dpto. Farmacia y Tecnologiá Farmaceútica (Farmacognosia), Facultad de Farmacia, Universidad de Navarra, Pamplona, Spain
  Methods: HPLC, UV, extraction, derivatization, evaporation
  
   
  
  Verbena officinalis
  CSDB ID 64984 (all data & tools)