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Molecules 2014, 19(11), 18152-18178; doi:10.3390/molecules191118152

Novel Flavonol Glycosides from the Aerial Parts of Lentil (Lens culinaris)

Department of Biochemistry, Institute of Soil Science and Plant Cultivation—State Research Institute, ul. Czartoryskich 8, Puławy 24-100, Poland
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Received: 18 September 2014 / Revised: 30 October 2014 / Accepted: 31 October 2014 / Published: 6 November 2014
(This article belongs to the Section Natural Products)
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Abstract

While the phytochemical composition of lentil (Lens culinaris) seeds is well described in scientific literature, there is very little available data about secondary metabolites from lentil leaves and stems. Our research reveals that the aerial parts of lentil are a rich source of flavonoids. Six kaempferol and twelve quercetin glycosides were isolated, their structures were elucidated using NMR spectroscopy and chemical methods. This group includes 16 compounds which have not been previously described in the scientific literature: quercetin 3-O-β-D-glucopyranosyl(1→2)-β-D-galactopyranoside-7-O-β-D-glucuropyranoside (1), kaempferol 3-O-β-D-glucopyranosyl(1→2)-β-D-galacto-pyranoside-7-O-β-D-glucuropyranoside (3), their derivatives 410,1215,17,18 acylated with caffeic, p-coumaric, ferulic, or 3,4,5-trihydroxycinnamic acid and kaempferol 3-O-{[(6-O-E-p-coumaroyl)-β-D-glucopyranosyl(1→2)]-α-L-rhamnopyranosyl(1→6)}-β-D-galactopyranoside-7-O-α-L-rhamnopyranoside (11). Their DPPH scavenging activity was also evaluated. This is probably the first detailed description of flavonoids from the aerial parts of lentil. View Full-Text
Keywords: lentil; Lens culinaris; phenolic compounds; flavonoids; NMR lentil; Lens culinaris; phenolic compounds; flavonoids; NMR
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MDPI and ACS Style

Żuchowski, J.; Pecio, Ł.; Stochmal, A. Novel Flavonol Glycosides from the Aerial Parts of Lentil (Lens culinaris). Molecules 2014, 19, 18152-18178.

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