D-Erythrose 4-phosphate sodium is a phosphate sodium of the simple sugar Erythrose. Erythritol is actually converted into D-Erythrose 4-phosphate that involves three isomerases^[1]. In Vitro: Erythritol is a preferential substrate for Brucella. Erythritol is actually converted into D-erythrose-4-phosphate through a set of reactions that involves three isomerases and that allows hexose-monophosphate synthesis and growth by feeding the pentose phosphate shunt^[1].