Abstract
Two new polyphenolic compounds, myricetin 3- O-(2″- O-galloyl)- β- d-glucopyranoside and (-)-6-chloroepicatechin, were isolated from the aerial parts of Geranium pratense subsp. finitimum (Woronow) Knuth, along with three known polyphenolic compounds [quercetin 3- O-(2″- O-galloyl)- β- d-glucopyranoside, quercetin 3- O-(2″- O-galloyl)- β- d-galactopyranoside, methyl gallate] and tryptophan. Quercetin 3- O- β- d-glucopyranoside, quercetin 3- O- β- d-galactopyranoside, quercetin 3- O-(2″- O-galloyl)- β- d-glucopyranoside and quercetin 3- O-(2″- O-galloyl)- β- d-galactopyranoside were found to be effective against free radical induced impairment of endothelium-dependent relaxation in isolated rat aorta.
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