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- W2028998511 abstract "Aus den oberirdischen Pflanzenteilen des Beinbrech (Narthecium ossifragum Hud.) wurde neben dem daraus bereits bekannten 2-Methoxy-buten-(2)-olid-(4.1) (1) ein racemisches Lacton 2 isoliert, das antibiotische Wirksamkeit gegen Bacillus subtilis zeigte. Die Struktur von 2 konnte als (±)-4-Hydroxy-3-methoxy-buten-(2)-olid-(4.1) bestimmt werden. Weiter fanden sich die Glucoside Narthesid A (3) und B (5), die nach enzymatischer Spaltung das gleiche Lacton 2 lieferten. Die Struktur des schon bekannten Narthesids A (3) konnte als (4S)-3-Methoxy-4-[β-D-glucopyranosyloxy]-buten-(2)-olid-(4.1) gesichert werden. Narthesid B (5) ist das zu 3 diastereomere Glucosid mit (4R)-Konfiguration. On Glycosides with Lactone-forming Aglycones, V. On Nartheside A and B, two Diastereomeric Lactone-Glucosides, and their Antibiotical Active Aglykone from Bog Asphodel (Narthecium ossifragum Hud.) From the above ground parts of Bog Asphodel (Narthecium ossifragum Hud.) a racemic lactone 2 was isolated beside the known 2-methoxy-2-buten-4-olide (1). 2 produces antibiotical activity against Bacillus subtilis. The structure of 2 was determined as (±)-4-hydroxy-3-methoxy-2-buten-4-olide. Farther the glucosides nartheside A (3) and B (5) were found producing the same lactone 2 after enzymatic hydrolysis. Therefore the structure of the already known nartheside A (3) was to be secured as (4S)-3-methoxy-4-(β-D-glucopyranosyloxy)-2-buten-4-olide. Nartheside B (5) is the glucoside diastereomeric to 3 with (4R)-configuration." @default.
- W2028998511 created "2016-06-24" @default.
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- W2028998511 date "1971-11-01" @default.
- W2028998511 modified "2023-10-16" @default.
- W2028998511 title "Über Glykoside mit lacton‐bildendem Aglykon, V. Über Narthesid A und B, zwei diastereomere Lacton‐Glucoside und ihr antibiotische wirksames Aglykon aus Beinbrech ( <i>Narthecium ossifragum</i> Hud.)" @default.
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- W2028998511 doi "https://doi.org/10.1002/cber.19711041122" @default.
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