5,6-Dihydro-6-ethenyl-4-hydroxy-2H-pyran-2-one is an intermediate in the synthesis of 4’-Hydroxy rac-Kavain (H944520), which is a metabolite of Kavain (K145490), shown in recent research to exhibit protective properties on anaerobic glycolysis, ATP content and intracellular calcium and sodium of anoxic brain vesicles.