title: Chemical constituents from tiger's betel, Piper porphyrophyllum N.E.Br. (Fam. Piperaceae).
abstract: Seven flavonoid compounds have been isolated from the aerial parts of tiger's betel (Piper porphyrophyllum), which were identified as 5,7-dimethoxyflavone, 4',5,7-trimethoxy-flavone, 3',4',5,7-tetramethoxyflavone, 4'-hydroxy-3',5,7-trimethoxyflavone, 5-hydroxy-3',4',7-trimethoxyflavone, 4',5-dihydroxy-3',7-dimethoxyflavone and 5-hydroxy-7-methoxyflavanone. The identification of all compounds was achieved by physical properties and spectroscopically. These data were also confirmed by comparison with previously reported spectral data. Flavonoid compounds with high content in P. porphyrophyllum can probably be used as a chemical marker for this Piper species.
authors.affiliation: Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, Skudai, Johor Bahru, Malaysia.
authors.forename: Emrizal
authors.initials: E
authors.lastname: Rajudin
authors.forename: Farediah
authors.initials: F
authors.lastname: Ahmad
authors.forename: Hasnah M
authors.initials: HM
authors.lastname: Sirat
authors.forename: Dayar
authors.initials: D
authors.lastname: Arbain
authors.forename: Hassan Y
authors.initials: HY
authors.lastname: Aboul-Enein
mesh_terms: D002855:Chromatography, Thin Layer; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D026321:Piperaceae / Q000737:chemistry*; D013057:Spectrum Analysis / Q000379:methods
chemical_list: D005419:Flavonoids