Kaempferol triosides from Silphium perfoliatum.
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).
el-Sayed
Nabil H
NH
National Research Centre, El-Tahrir St., Dokki, Cairo, Egypt. nabil_17@yahoo.com
Wojcińska
Małgorzata
M
Drost-Karbowska
Krystyna
K
Matławska
Irena
I
Williams
Jeffrey
J
Mabry
Tom J
TJ
D019659:Asteraceae / Q000737:chemistry*; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D044949:Kaempferols; D013057:Spectrum Analysis
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)