Phytochemical examination of Vernonia flexuosa Sims. Part I. Isolation of 5,4'-dihydroxy-7,3'-dimethoxyflavone.
The isolation of the title compound (velutin) from Vernonia flexuosa Sims, and the elucidation of its structure are described.
D002854:Chromatography, Paper; D002855:Chromatography, Thin Layer; D005419:Flavonoids / Q000032:analysis / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D010936:Plant Extracts / Q000032:analysis*; D010944:Plants / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet
D005419:Flavonoids; D010936:Plant Extracts