Full Length Research Paper

Abstract

New flavonol glycoside, 4`-p-hydroxybenzoylisorhamnetin-3-O-α-L-rhamnopyrano-side named cerato-side (5), together with the known kaempferol-3-O-α-L-rhamnopyranoside (afzelin) (3), quercetin-3-O-α-L-arabinofuranoside (auriculain) (4) quercetin-3-O-α-L-rhamnopyranoside (6), β-sitosterol (1) and β-sitosterol-3-O-β-D-glucoside (2) were isolated for the first time from Ceratonia siliqua L. seeds. The identity of these compounds was established through UV, IR, MS and NMR spectral data. The antioxidant activity of the organic solvent fractions together with some isolated compounds were carried out and showed significant results.

Key words: Ceratonia siliqua, carob; flavonol glycosides, antioxidants.