Flavonoids from Ephedra aphylla

Article abstract of DOI:10.1016/S0031-9422(97)00092-7

A new di-C-glucosylflavone, 2',2'-di-O-β-glucopyranosyl-vicenin II and a new flavonol di-O-glycoside, herbacetin 3-O-α-rhamnopyranoside-8-O-β- glucopyranoside, were isolated from the aerial parts of Ephedra aphylla. Vicenin II, the 7-methoxy-4-quinolone 2-carboxylic acid, ephedralone, p- hydroxybenzoic, p-coumaric, protocatechuic acids and herbacetin 7-methyl ether were also isolated. The ¹³C NMR spectrum of the latter compound has been assigned for the first time.