2,3-Dihydroxy-, 1,4-dimethyl ester, (2S,3R)-rel-butanedioic acid

(2r,3s)-tartaric acid dimethyl ester ; dimethyl dextro-tartrate ; d-dimethyl l-tartrate ; (2r,3s)-2,3-dihydroxybutanedioic acid dimethyl ester ; dimethyl (2s,3s)-2,3-dihydroxybutanedioate ; (2s,3s)-2,3-dihydroxysuccinic acid dimethyl ester ; meso-tartaric acid dimethyl ester ; (2s,3r)-2,3-dihydroxybutanedioic acid dimethyl ester ; d-dimethyl tartrate ; dimethyl d-tartrate 99% (99+% ee/glc)