Flavonoid glycosides from Periploca laevigata (Asclepiadaceae) from Algeria

Abstract : The phytochemical investigation of the n-butanol extract of aerial parts of Periploca laevigata resulted in the isolation of four known compounds, kaempferol 3-O-β-arabinopyranoside (1), kaempferol 3-O-β-glucopyranoside (2), quercetin 3-O-arabinopyranoside (3) and quercetin 3-O-rutinoside (4).The structures of the compounds were determined on the basis of extensive spectroscopic analysis, including 1D and 2D NMR as well as acid hydrolysis and comparison with the related known compounds.