Benzophenone glycosides from Gnidia involucrata
- Phytochemistry. 2000 Aug;54(8):883-9. doi: 10.1016/s0031-9422(00)00046-7.
- 1. Institut de Pharmacognosie et Phytochimie, Université de Lausanne, Switzerland.
Six compounds have been isolated from the methanol extract of the aerial parts of Gnidia involucrata (Thymelaeaceae). They were identified as 2,3,4',5,6-pentahydroxybenzophenone-4-C-glucoside and 2,4',6-trihydroxy-4-methoxybenzophenone-2-O-glucoside, together with mangiferin, kaempferol-3-O-glucoside, yuankanin and manniflavanone by chemical and spectroscopic means. The structures of three additional C-glycosyl flavones--vitexin, isovitexin and isoorientin--were determined on-line by LC/UV/APCI-MSn analysis of the crude extract.