Antiviral activity of a new flavone glycoside from Emilia sonchifolia DC.

摘要

A new flavone glycoside 1 molecular formula C_(32)H_(38)O_(19) m.p. 246-48°C, [M]~+ 726 (FABMS), has been isolated from seeds of Emilia sonchifolia DC. It has been characterized as 3,7,3',4'-tetrahydroxy-flavone-3-O-β-D-xylopyranosyl-(1→3)-O-β-D-gal-actopyranosyl-(1→4)-O-α-L-rhamnopyranoside by various chemical degradations and spectral analysis alongwith two known compounds Luteolin-7-O-β-D-glucoside 2 and Isoetin 5'-methyl ether 3