Two flavonol triglycosides from flowers of Indigofera hebepetala.
Two new flavonol triglycosides, kaempferol 3-omicron-alpha-L-rhamnopyranosyl(1->2)-beta-D-galactopyranoside-7-O- alpha-L-arabinofuranoside and kaempferol 3-O-alpha-rhamnopyranosyl(1-->6)-beta-D-galactopyranoside-7-O- alpha-L-arabinofuranoside were isolated from the flowers of Indigofera hepepetala, together with three known glycosides, kaempferol 3-omicron-alpha-L-arabinopyranoside-7-O-alpha-L-rhamnopyranoside, kaempferol 3-O-alpha-L-rhamnopyranoside-7-O-alpha-L-arabinopyranoside and kaempferol 7-rhamnoside. The structures were determined by means of Rf values, UV, EI-mass spectrometry, FAB-mass spectrometry, 1H NMR, 13C (B.B and DEPT) NMR, NOE difference measurement and 1H-1H COSY spectral data.
Hasan
A
A
Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan.
Ahmad
I
I
Khan
M A
MA
Chudhary
M I
MI
D005419:Flavonoids; D044949:Kaempferols; D009682:Magnetic Resonance Spectroscopy; D010944:Plants / Q000737:chemistry*; D011794:Quercetin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013056:Spectrophotometry, Ultraviolet
D005419:Flavonoids; D044949:Kaempferols; C103681:kaempferol 3-O-rhamnopyranosyl(1-2)-galactopyranoside-7-O-arabinofuranoside; C103683:kaempferol 3-O-rhamnopyranosyl(1-6)-galactopyranoside-7-O-arabinofuranoside; D011794:Quercetin