title: Two new saponins from Zygophyllum atriplicoides.
abstract: Phytochemicals investigation of the whole plant of Zygophyllum atriplicoides resulted in the isolation of two new triterpenoidal saponins together with a known compound. The structure of the new compounds atriplicosaponin A (1) and atriplicosaponin B (2) were established as 3-O-[alpha-D-glucopyranosyl-(1-->2)-beta-D-xylopyranosyl]-hederagenin and 27 alpha-hydroxyurs-12-ene-3-O-[beta-D-glucopyranosyl(1-->4)(2-O-sulpho)-beta-D-quinovopyranoside] and known compound was identified as 3-O-[beta-D-glucopyranosyl]-beta-sitosterol. The structure elucidations of the compounds were based primarily on 1D and 2D-NMR analysis, including COSY, HMBC and HMQC correlations.
authors.affiliation: HEJ Research Institute of Chemistry, International Center for Chemical Sciences, University of Karachi; 75270 Karachi, Pakistan. vuahmad@cyber.net.pr
authors.forename: Viqar Uddin
authors.initials: VU
authors.lastname: Ahmad
authors.forename: Shazia
authors.initials: S
authors.lastname: Iqbal
authors.forename: Farzana
authors.initials: F
authors.lastname: Kousar
authors.forename: Sadia
authors.initials: S
authors.lastname: Bader
authors.forename: Saima
authors.initials: S
authors.lastname: Arshad
authors.forename: Rasool Bakhsh
authors.initials: RB
authors.lastname: Tareen
mesh_terms: D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D002855:Chromatography, Thin Layer; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D010936:Plant Extracts / Q000737:chemistry; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013056:Spectrophotometry, Ultraviolet; D032445:Zygophyllum / Q000737:chemistry*
chemical_list: D010936:Plant Extracts; D012503:Saponins; C505009:atriplicosaponin A; C505008:atriplicosaponin B