CHEMISTRY OF THE GENUS ALLIUM .2. THE FLAVONOIDS OF ALLIUM-NEAPOLITANUM

An investigation of the extracts from Allium neapolitanum has led to t he isolation of 13 flavonoid glycosides, based on kaempferol, querceti n and isorhamnetin. Four of them are new compounds and have been ident ified as: kaempferol -O-beta-D-glucopyranosyl]-beta-D-glucopyranoside} , isorhamnetin -O-beta-D-glucopyranosyl]-beta-D-glucopyranoside}, isor hamnetin -beta-D-glucopyranosyl]-beta-D-glucopyranoside}-7- O-beta-D-g lucopyranoside and isorhamnetin -6-O-beta-D-gentiobiosyl]-beta-D-gluco pyranoside}. The isolated compounds were evaluated for their anti-aggr egation human platelet activity. Copyright (C) 1997 Elsevier Science L td.