Phytochemical investigation on Atriplex halimus L. from Sardinia.

In this study, we reported the phytochemical composition of the aerial parts of Atriplex halimus L. collected from Sardinia. This species is a halophytic shrub, typical of the Mediterranean Basin. Four new glycosylated flavonoids were isolated and their structures were elucidated on the basis of 1D, 2D NMR and MS spectra as 3,5-dimethoxymyricetin-3-O--d-xylopyranosyl-7-O-fucopyranosyl-(13)--d-glucopyranoside (1), 3-methoxyquercetin-7-O--d-fucopyranosyl-(13)--d-glucopyranosyl-3-O--xylopyranosyl-(14)--xylopyranoside (2), 3-methoxyquercetin-7-O--l-rhamnopyranosyl-3-O--arabinofuranosyl-(16)--d-glucopyranoside (3) and 3,5-dimethoxymyricetin-7-O-fucopyranosyl-(13)--d-glucopyranoside (4). LC-MSn analysis on the extract revealed the presence of other myricetin, quercetin, isorhamnetin glycosides, simple phenolic acids and esters.