Antioxidant flavonoids from Alhagi maurorum

Abstract

A new flavonoid, isorhamnetin-3-O-[-α-l-rhamnopyranosyl-(1 → 3)]-β-d-glucopyranoside (1), along with two known flavonoids 3′-O-methylorobol (2) and quercetin 3-O-β-d-glucopyranoside (3), was isolated from Alhagi maurorum. Their structures were established with the help of mass spectrometry, 1D and 2D NMR spectroscopy, and in comparison with the literature data. Compounds 1 and 2 exhibited moderate antioxidant activity in the 2,2-diphenyl-1-picrylhydrazyl free radical scavenging assay.

Keywords:

• Alhagi maurorum
• flavonoid glycosides
• antioxidant
• 2,2-diphenyl-1-picrylhydrazyl radical scavenging