Glycosides and acylated glycosides of isoetin from european species of Hypochoeris

Abstract A chemical investigation of the leaves of Hypochoeris spp. yielded four new isoetin (5,7,2′,4′,5′-pentahydroxyflavone) derivatives: isoetin 2′-xyloside, isoetin 7-glucoside-2′-xyloside and their 4″ (xylose) acetylated products.