A New Flavonoidal Constituent from Taraxacum officinale (L.) Weber

摘要

A new flavone glycoside (A) m.p. 265-268 °C, m.f. C_(33)H_(40)O_(21), [M]~+ 742 (FABMS), has been isolated from stem of Taraxacum oflcinale (L.) Weber. It was characterized as 3,5,7,3',4'-pentahydroxy 8-C methyl flavone 7-O-β-D-xylopyranosyl (1→4)O-β-D glucopyranosyl 3'-O-α-L-rhamnopyranoside alongwith known compound ladanein B by various chemical degradations and spectral analysis.