6 FURTHER LIPOPHILIC FLAVONOLS FROM THE LEAF OF VELLOZIA-STIPITATA

Six new lipophilic flavonols have been characterized from the leaf of Vellozia stipitata: vellokaempferol 3,5-dimethyl ether, velloquercetin 3-methyl ether and 3,5,3'-trimethyl ether, 8-C-methylvellokaempferol 3,5-dimethyl ether, 8-C-methylvelloquercetin 3-methyl ether and 3,5,3' -trimethyl ether. A seventh compound present is identical to dihydroxy -3,6,7,3'-tetramethoxy-8-C-methylflavone, recently detected in V. lila cina and V. aff. epidendroides. Vacuolar flavonoids in the leaf includ e iso-orientin 7-glucoside, iso-orientin, an orientin O-glucoside and a vicenin derivative. This pattern of flavonoid accumulation is compar ed with that present in the leaf of V. streptophylla.