ACYLATED FLAVONOL GLYCOSIDES FROM CABBAGE LEAVES

Seven flavonol glycosides were isolated from a leaf extract of cabbage and characterized by chemical and spectroscopic methods including H-1 and C-13 NMR and negative ion FAB-MS. Five compounds were new natural products or were fully characterized for the first time. They are der ivatives of pferol-3-O-beta-D-sophoroside-7-O-beta-D-glucoside acylate d at C-2''' with either caffeic acid, p-coumaric acid or ferulic acid, and of rcetin-3-O-beta-D-sophoroside-7-O-beta-D-glucoside acylated wi th either caffeic acid or ferulic acid. pferol-3-O-beta-D-sophoroside- 7-O-beta-D-glucoside and eta-D-(2-sinapoylsophoroside)-7-O-beta-D-gluc oside were found for the first time in cabbage, but they have previous ly been found in other Brassica species.