Isolierung und Identifizierung der Flavon(ol)glykoside der Endivien (Cichorium endivia L.) und des Kopfsalates (Lactuca sativa L.) / Isolation and Identification of the Flavon(ol) glycosides of the Endive (Cichorium endivia L.) and the Lettuce (Lactuca sativa L .)

Abstract

Abstract For the first time, quercetin-3-β-ᴅ-glucuronide, quercetin-3-β-ᴅ-glucoside, quercetin-3-(O-malonyl) -β-ᴅ-glucoside and luteolin-7-/9-ᴅ-glucuronide were isolated from lettuce and kaempferol-3-β-D-glucuronide and kaempferol-3-β-ᴅ-glucoside from endives as crystals. The flavonol glucuronides are the main glycosides. Moreover a glycoside was found in endives which is very probably identical with kaempferol-3-(O-malonyl) -β-ᴅ-glucoside.