title: A sesquiterpene acid and flavonoids from Polygonum viscosum.
abstract: 4-Isobutyl-6-methyl-5-oxo-3a,4,5,7a-tetrahydro-1H-inden-13-oic acid (named viscosumic acid) and quercetin 3-O-(6"-feruloyl)-beta-D-galactopyranoside, and the known 3',5-dihydroxy-3,4',5',7-tetramethoxyflavone have been isolated from Polygonum viscosum. The structures of these isolates were determined primarily on the basis of extensive 1D and 2D NMR spectral analyses, notably, 13C PENDANT, COSY45, TOCSY, GOESY, NOESY, HMQC and HMBC.
authors.affiliation: Department of Pharmacy, University of Dhaka, Bangladesh.
authors.forename: B K
authors.initials: BK
authors.lastname: Datta
authors.forename: S K
authors.initials: SK
authors.lastname: Datta
authors.forename: M A
authors.initials: MA
authors.lastname: Rashid
authors.forename: R J
authors.initials: RJ
authors.lastname: Nash
authors.forename: S D
authors.initials: SD
authors.lastname: Sarker
mesh_terms: D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D005697:Galactosides / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D019664:Polygonaceae / Q000737:chemistry*; D011794:Quercetin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification*; D013057:Spectrum Analysis
chemical_list: C414952:3',5-dihydroxy-3,4'5',7-tetramethoxyflavone; D005419:Flavonoids; D005697:Galactosides; D012717:Sesquiterpenes; C414951:quercetin 3-O-(6''-feruloyl)galactopyranoside; C414950:viscosumic acid; D011794:Quercetin