title: Flavones and phenylpropenoids in the surface exudate of Psiadia punctulata.
abstract: Three flavones, 5,7-dihydroxy-2',3',4',5'-tetramethoxyflavone, 5,4'-dihydroxy-7,2',3',5'-tetramethoxyflavone, and 5,7,4'-trihydroxy-2',3',5'-trimethoxyflavone were isolated from the leaf exudate of Psiadia punctulata, together with the previously reported 5-hydroxy-7,2',3',4',5'-pentamethoxyflavone and 5,7,3'-trihydroxy-2',4',5'-trimethoxyflavone. The two phenylpropenoids, Z-docosyl-p-coumarate and E-docosyl-p-coumarate were also isolated. The structures were determined on the basis of spectroscopic evidence.
authors.affiliation: Department of Chemistry, University of Nairobi, Kenya.
authors.forename: B F
authors.initials: BF
authors.lastname: Juma
authors.forename: A
authors.initials: A
authors.lastname: Yenese
authors.forename: J O
authors.initials: JO
authors.lastname: Midiwo
authors.forename: P G
authors.initials: PG
authors.lastname: Waterman
mesh_terms: D019659:Asteraceae / Q000737:chemistry* / Q000627:therapeutic use; D003373:Coumaric Acids / Q000737:chemistry* / Q000302:isolation & purification*; D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification*; D008517:Phytotherapy; D018515:Plant Leaves / Q000737:chemistry; D018514:Plant Structures / Q000737:chemistry
chemical_list: D003373:Coumaric Acids; D005419:Flavonoids