NAPHTALINGLYKOSIDE IN DER RINDE VONRHAMNUS FRANGULA

Abstract

Three glycosides of 1,s-dihidroxy-2-acetonaphtone were isolated from bark o f Rhamnzls frangula. T h e glucidic rest of the first was gltrcose and rhamnose while in the two others it was only glticose. It has been established that in the two natural glzicosides the glticidic rest was bound in diglucidic form to the one of C1 or C8 hydroxyl and the two nattiral glucosides were positional isomers. This was proved by quantitative estimation of aglyconlglucoside ratio, throzfgh preparation of monomethylether as well as comparing to the semisynthesis 1,8-dihidroxy-2-acetonaphtone of the 1,8-diglucoside.