A new antiviral flavone glycoside from vernonia cinerea less

Abstract

A new flavone glycoside (A) m.p. 258-260 °C, m.f. C33H 40O19, [M] 740 (FABMS), has been isolated from roots of Vernonia cinerea Less. It was characterized as 5,7,4'-trihydroxy 3'-methoxy flavone-4'-O-a-L-rhamnopyranosyl-(14)-O-a-L-arabino-pyranosyl-(1 3)-O-b- D-galactopyranoside by various chemical degradations and spectral analysis which showed antiviral activity alongwith two known compounds luteolin (B) and taxifolin (C).