2,3,4-Tri-O-acetyl-alpha-D-glucuronic Acid Methyl Ester

2,3,4-Tri-O-acetyl-alpha-D-glucuronic acid methyl ester is a fully acetylated glucuronic acid derivative featuring three acetyl groups at the 2, 3, and 4 positions of the pyranose ring, with the anomeric center in the alpha configuration and a methyl ester substituent at the carboxylic acid terminus. This compound arises as a synthetic byproduct during the acetylation of glucuronic acid derivatives, commonly encountered in the production of glycoside-based APIs. Its distinct regiochemistry and ester functionality enable its use as an HPLC reference standard for impurity profiling in parent drug manufacturing.