The flavonoids kaempferol, quercetin, trifolin, hyperoside 2″- and 6″- acetates, 7-glucotrifolin, biorobin and robinin were isolated from the aerial parts of Consolida oliveriana. Their derivatives kaempferol tetraacetate, quercetin pentaacetate, trifolin heptaacetate and hyperoside octaacetate exhibited significant cytotoxicity in vitro against three human cell lines HL-60, U937 and SK-MEL-1 while hyperoside 2″-acetate, hyperoside-6″-acetate, glucotrifolin decaacetate and heptamethyltrifolin were inactive.
Direct stereochemical assignment of hexose and pentose residues in flavonoidO-glycosides by fast atom bombardment and electrospray ionization mass spectrometry
作者:Filip Cuyckens、Abdelaaty A. Shahat、Luc Pieters、Magda Claeys
DOI:10.1002/jms.402
日期:2002.12
Mass spectrometric methods have been developed which allow the direct stereochemical assignment of terminal monosaccharide residues in flavonoid O-glycosides without the need for chemical hydrolysis. Standards containing a glucose, galactose, mannose, xylose, arabinose or apiose residue were examined because these monosaccharides are by far the most commonly encountered in flavonoid glycosides. Following