Abstract
Five lipophilic flavonoids were identified in Vellozia aff. scoparia: kaempferol, kaempferol 3-methyl ether, luteolin, chrysoeriol and a new compound, 6-prenylherbacetin 3,8-dimethyl ether. Five such substances were identified in V. phalocarpa: luteolin, chrysoeriol, eriodictyol, 6- C-methylquercetin 3-methyl ether and 8- C-methylquercetagetin 3,6,7,4′-tetramethyl ether. Five compounds were identified in V. laevis: velloquercetin 3,3′-dimethyl ether, 8- C-methyl-6-hydroxykaempferol 3,6,7-trimethyl ether and the 3,6,7,3′- and 3,6,7,4′-tetramethyl ethers of 8- C-methylquercetagetin. A method for distinguishing these latter two isomers is described. All three species also contained a range of vacuolar flavone O- and C-glycosides; two contained a new conjugate of orientin, the 7-caffeate. These lipophilic and vacuolar flavonoid patterns were compared with those of seven other Vellozia species and the results used to prepare similarity indices within the genus. Although all 10 species have distinctive profiles, there is no evidence to suggest that any of these species should be transferred to a different genus.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call