(2R,3R,4R)-Meth­yl 2-bromo-3,4-dihydr­oxy-3,4-O-isopropyl­idenetetra­hydro­furan-2-carboxyl­ate

The relative configuration of the quaternary C atom in the title bromide, C9H13BrO5, prepared by bromination of the parent ester, has been determined by X-ray crystallographic analysis; the absolute configuration is known from the synthesis.