(2R,3R)-1-Ethyl 2,3-Bis(acetyloxy)butanedioic Acid Ester is an intermediate used in the synthesis of (2R,3R)-4- Ethoxy- 2, 3- dihydroxy- 4- oxobutanoic Acid (E679620), which was studied for to be a possibe bifunctional gasoline- methanol additive.