ALKYL KETONE, ARACHIDYL AND PHENOLIC XYLOSIDES FROM THE TUBERS OF CYPERUS ROTUNDUS L.

Vijender Singh, Mohammed Ali*, Shahnaz Sultana and Showkat Rasool Mir

ABSTRACT

Cyperus rotundus L. (Cyperaceae), is a perennial sedge distributed throughout India and other regions of the world. Its tubers are used as an appetizer, anti-inflammatory and to treat thirst, pyrexia, cough, vomiting, rheumatoid arthritis, worm infestation, stomach ailments, diarrhea, skin diseases, wounds and bleeding. Our study was planned to isolate chemical constituents from the tubers of C. rotundus and to characterized their structures. Phytochemical investigation of the tubers led to the isolation of an aliphatic ketone identified as (Z)-n-pentacos-19-ene-10-one (1), an acyl glycoside characterized as n-eicosanoyl β-D-xylopyranoside (arachidyl xyloside, 2), β-sitosterol 3-β-D-glucopyranoside (3), and three phenolic xylosides recognized as n-5ʹβ-hydroxynonadecanyl-2-xylopyranosyloxy- benzoate ( n-nonadecanyl salicylate xyloside, 4), 3ʹβ-hydroxyhenecosanyl 2-xylopyranosyloxy benzoate (n-heneicosanyl salicylate xyloside, 5) and 9ʹβ-hydroxy-n-pentacosanyl-2-xylopyranosyl salicylate (n-pentacosanyl salicylate xyloside, 6). The structures of these phytoconstituents, isolated for the first time from the tubers, have been established on the basis of spectral data analysis and chemical reactions.

Keywords: Cyperus rotundus, tubers, phytoconstituents, isolation, structures elucidation.