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Yarosh, E. A.; Gigoshvili, T. I.; Alaniya, M. D.

doi:10.1023/a:1017671014428

Chemistry of Natural Compounds

2001

DOI: 10.1023/a:1017671014428

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E. A. Yarosh

T. I. Gigoshvili

M. D. Alaniya

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Cited by 9 publications

(1 citation statement)

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“…Comparison with an authentic sample identified it as quercetin [6]. The carbohydrate part of the hydrolysate contained D-glucose, D-galactose, and L-rhamnose according to PC.…”

mentioning

confidence: 98%

Flavonoid oligosides from georgian Astragalus falcatus

et al. 2011

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We reported previously on flavonoids from leaves and flowers of Astragalus falcatus Lam. (Leguminosae L.) inhabiting Georgia [1]. The plant is the official raw material for producing the substance for the drug flaronin with hypoazotemic and diuretic activity [2,3]. The raw material contains robinin trioside (trade name flaronin) and highly polar compounds as impurities (up to 5%) in flaronin substance [2]. These glycosides are difficult to isolate because they are highly hydrophilic.The components could be separated (see Experimental) from the total polar flavonoids that were isolated by preparative paper chromatography (PC) by using reversed-phase HPLC. The obtained compounds were denoted falcosides A-E. The individual components were analyzed in order to determine their structures after they were accumulated in significant amounts.It was found that falcosides A, B, and E were oligosides of kaempferol with sugar components such as D-glucose, D-galactose, L-arabinose, and L-rhamnose in falcoside A; D-glucose, D-galactose, D-xylose, and L-rhamnose in falcoside B; and D-glucose, D-galactose, L-arabinose, D-xylose, and L-rhamnose in falcoside E.The structures of falcosides C and D were elucidated on the basis of UV, IR, PMR, 13 C NMR, HMBC, HSQC, and 1D-TOCSY spectroscopy and mass spectrometry.Falcoside C was a yellow powder that gave a positive Shinoda reaction [4] and negative Bryant test [5]. The molecular weight 934 (mass spectrometry) corresponded to the formula C 39 H 50 O 26 . The IR spectrum showed absorption bands characteristic of flavonoids at 3600 cm -1 (OH) and 1650 (J-pyrone C=O). The compound was designated as a flavonol glycoside based on absorption maxima in the UV spectrum in EtOH at 360 and 255 nm.

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“…Comparison with an authentic sample identified it as quercetin [6]. The carbohydrate part of the hydrolysate contained D-glucose, D-galactose, and L-rhamnose according to PC.…”

mentioning

confidence: 98%

Flavonoid oligosides from georgian Astragalus falcatus

et al. 2011

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Application of HPCCC, UHPLC-PDA-ESI-MS 3 and HPLC-PDA methods for rapid, one-step preparative separation and quantification of rutin in Forsythia flowers

Kicel

Owczarek

Michel

et al. 2015

Industrial Crops and Products

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UV protection properties of silk fabric dyed with eucalyptus leaf extract

Mongkholrattanasit

Kryštůfek

Wiener

et al. 2011

Journal of the Textile Institute

102

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Untitled

Cited by 9 publications

References 0 publications

Flavonoid oligosides from georgian Astragalus falcatus

Flavonoid oligosides from georgian Astragalus falcatus

Application of HPCCC, UHPLC-PDA-ESI-MS 3 and HPLC-PDA methods for rapid, one-step preparative separation and quantification of rutin in Forsythia flowers

UV protection properties of silk fabric dyed with eucalyptus leaf extract

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