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.