title: Kaempferol triosides from Silphium perfoliatum.
abstract: Two apiose-containing kaempferol triosides, together with nine known flavonoids were isolated from the leaves of Silphium perfoliatum L. Their structures were elucidated by acid hydrolysis and spectroscopic methods including UV, LSI MS, FAB MS, CI MS, (1)H, (13)C and 2D-NMR, DEPT, HMQC and HMBC experiments. The two new compounds were identified as kaempferol 3-O-beta-D-apiofuranoside 7-O-alpha-L-rhamnosyl-(1""-->6"')-O-beta-D-galactopyranoside and kaempferol 3-O-beta-D-apiofuranoside 7-O-alpha-L-rhamnosyl-(1''''--> 6"')-O-beta-D (2"'-O-E-caffeoylgalactopyranoside).
authors.affiliation: National Research Centre, El-Tahrir St., Dokki, Cairo, Egypt. nabil_17@yahoo.com
authors.forename: Nabil H
authors.initials: NH
authors.lastname: el-Sayed
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Wojcińska
authors.forename: Krystyna
authors.initials: K
authors.lastname: Drost-Karbowska
authors.forename: Irena
authors.initials: I
authors.lastname: Matławska
authors.forename: Jeffrey
authors.initials: J
authors.lastname: Williams
authors.forename: Tom J
authors.initials: TJ
authors.lastname: Mabry
mesh_terms: D019659:Asteraceae / Q000737:chemistry*; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D044949:Kaempferols; D013057:Spectrum Analysis
chemical_list: D005419:Flavonoids; D044949:Kaempferols; C470771:kaempferol 3-O-apiofuranoside 7-O-alpha-rhamnosyl-(1'''-6''')-O-galactopyranoside; C470772:kaempferol 3-O-apiofuranoside 7-O-rhamnosyl-(1''''-6''')-O- (2'''-O-E-caffeoylgalactopyranoside)