Transformation of ketoses into aldoses

An equilibrum passing through the stage of an endiol

The reaction leads to the ketose / aldose mixture. The equilibrium is very sensitive to the experimental conditions (pH, concentrations, temperature ..)

Exercise

Which substances result by the previous equilibrium on D-fructose?

Answer (Review →   this page and →     this one ): D-fructose $\leftrightarrows$ ..........