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

Molecules

Jerzy Żuchowski¹  Łukasz Pecio²  Anna Stochmal² 

[1] Department of Biochemistry, Institute of Soil Science and Plant Cultivation—State Research Institute, ul. Czartoryskich 8, Puławy 24-100, Poland;

关键词: lentil;    Lens culinaris;    phenolic compounds;    flavonoids;    NMR;   

DOI  :  10.3390/molecules191118152

来源: mdpi

【 摘 要 】

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 4–10, 12–15, 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.

【 授权许可】

CC BY   
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