Polyphenols, Condensed Tannins, and Other Natural Products in Onobrychis viciifolia (Sainfoin)
| Autor: | I. Mueller-Harvey, Daneel Ferreira, Jannie P.J. Marais, E. V. Brandt |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
chemistry.chemical_classification
Biological Products Magnetic Resonance Spectroscopy Plants Medicinal biology Chemistry Onobrychis viciifolia Phloroglucinol Fabaceae General Chemistry biology.organism_classification chemistry.chemical_compound Proanthocyanidin Biochemistry Polyphenol Tannin Gallocatechin Food science Afzelin General Agricultural and Biological Sciences Tannins Prodelphinidin |
| Zdroj: | Journal of Agricultural and Food Chemistry. 48:3440-3447 |
| ISSN: | 1520-5118 0021-8561 |
| Popis: | An acetone/water extract of the fodder legume Onobrychis viciifolia afforded arbutin, kaempferol, quercetin, rutin, afzelin, the branched quercetin-3-(2(G)-rhamnosylrutinoside), the amino acid L-tryptophan, the inositol (+)-pinitol, and relatively high concentrations of sucrose (ca. 35% of extractable material). Acid-catalyzed cleavage of the condensed tannins with phloroglucinol afforded catechin, epicatechin and gallocatechin as the terminal and extender units, but epigallocatechin was only present in extender units. The condensed tannins in O. viciifolia presumably consist of hetero- and homopolymers containing both procyanidin and prodelphinidin units. Comparison of data from the present study and the literature suggests that sainfoin tannins have a highly variable composition with cis:trans ratios ranging from 47:53 to 90:10 and delphinidin:cyanidin ratios from 36:64 to 93:7. The composition of terminal and extender units in sainfoin tannins seems to be cultivar specific. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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