title: NEW ALIPHATIC ESTER, β-SITOSTEROL DIGLUCOSIDE AND VESICARIA BIFLAVONES FROM THE SEEDS OF RUMEX VESICARIUS L.
abstract: Rumex vesicalius L. (Polygonaceae) is an annual, monoecious, glabrous, pale green herb cultivated as a leafy vegetable in south western Asia and northern Africa. Its seeds are prescribed as a refrigerant, laxa- tive, antidote for scorpion venom and to cure dysentery and liver diseases. Phytochemical investigation of a methanolic extract of the seeds of R. vesicarius resulted in the isolation of a new aliphatic ester n-heptacosanyl n-hexanoate (2), a steroidal diglucoside stigmasta-5-en-3-ol-3-O-β-D-glucopyranosido-(4--->1")-O-β-D-glu- copyranoside (3) and two bioflavonoids characterized as (2a,3a-trans)-3a(β),5a,7a,3'a,4'a-pentahydroxyfla- vanolyl-(8a-2')-5,7,3'-trihydroxy-4'-methoxy-8-n-but-3"-enyl-flavanone (4) and 5,7,3',4',5'-pentahydroxy- 8-(cis-1" α,2"β-dihydroxyhept-4"-enyl-7"-oic acid)-flavanoyl-(2'--8a)-5a,7a,3'a,5'a-tetrahydroxy-4'a- methoxyflavanone (5) together with stigmasterol (1). The structures of all the isolated phytoconstituents have been established on the basis of spectral data analysis and chemical reactions.
authors.forename: Abdul Wadood
authors.initials: AW
authors.lastname: Siddiqui
authors.forename: Mohammed
authors.initials: M
authors.lastname: Ali
authors.forename: Kamran J
authors.initials: KJ
authors.lastname: Naquvi
authors.forename: Shahnaz S
authors.initials: SS
authors.lastname: Husain
mesh_terms: D044946:Biflavonoids / Q000032:analysis* / Q000737:chemistry; D004952:Esters / Q000032:analysis; D031804:Rumex / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry; D012855:Sitosterols / Q000032:analysis* / Q000737:chemistry
chemical_list: D044946:Biflavonoids; D004952:Esters; D012855:Sitosterols; C011015:lyoniside