C-glycosylflavones from Oryza sativa

Abstract Eight flavone C -glycosides isolated from rice plant were found to act as probing stimulants for planthoppers. They have been identified as the known compounds schaftoside, neoschaftoside, carlinoside, isoorientin 2″-glucoside and the new constituents neocarlinoside (6- C -β- D -glucopyranosyl-8- C -β- L -arabinopyranosylluteolin), isoscoparin 2″-glucoside (chrysoeriol 6- C -β- D -(2- O -β- D -glucopyranosyl)glucopyranoside) and its 6‴- p -coumaric and ferulic acid esters.