Xanthorhamnin is a chemical compound. It can be isolated from buckthorn berries (''

Rhamnus catharticus ''Rhamnus cathartica'', the European buckthorn, common buckthorn, purging buckthorn, or just buckthorn, is a species of small tree in the flowering plant family Rhamnaceae. It is native to Europe, northwest Africa and western Asia, from the cen ...

''). The aglycone of xanthorhamnin is

rhamnetin Rhamnetin is an O-methylated flavonol, a type of chemical compound. It can be isolated from cloves. The structure of the molecule was discovered by Austrian chemist Josef Herzig (1853–1924). Glycosides Rhamnetin is the aglycone of xanthorh ...

References

O-methylated flavonols Flavonol glycosides {{Aromatic-stub