2,3-Di-C-methyl-d-allono-1,4-lactone

The relative configuration of the title compound, C8H14O6, was firmly established by X-ray crystallographic analysis. The absolute configuration was determined by the use of 2-C-methyl-d-ribono-1,4-lactone as the starting material. The crystal structure is stabilized by O—H⋯O hydrogen bonds, with each mol­ecule acting as a donor and an acceptor for five hydrogen bonds.