Trans-fused Iridoid GlycosidEs from Penstemon Mucronatus

Two new trans-fused iridoid glycosides (5 αH)-6 α-8-epidihydrocornin and (5 αH)-6 α-8-hydroxy-8-epiloganin, were isolated from Penstemon mucronatus, along with cornin, penstemoside and three hastatosides. The trans-fused iridoids are only the second and third known among over 900 described cis-fused...

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Veröffentlicht in:	Phytochemistry (Oxford) 1998-12, Vol.49 (8), p.2413-2415
Hauptverfasser:	Krull, Robert E., Stermitz, Frank R.
Format:	Artikel
Sprache:	eng
Schlagworte:	Biological and medical sciences Carbohydrate Conformation Chemical constitution Fundamental and applied biological sciences. Psychology Glucosides - chemistry Glucosides - isolation & purification Iridoid Glucosides iridoid glycosides Iridoids isolation Magnetic Resonance Spectroscopy Penstemon mucronatus Plant physiology and development Plants - chemistry Scrophulariaceae Spectrometry, Mass, Fast Atom Bombardment Stereoisomerism taxonomy
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Beschreibung
Zusammenfassung:	Two new trans-fused iridoid glycosides (5 αH)-6 α-8-epidihydrocornin and (5 αH)-6 α-8-hydroxy-8-epiloganin, were isolated from Penstemon mucronatus, along with cornin, penstemoside and three hastatosides. 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.
ISSN:	0031-9422 1873-3700
DOI:	10.1016/S0031-9422(98)00349-5