Ethyl 1-thio-D-glucopyranosiduronic acid is a biochemical reagent utilized in the study of glycobiology. Glycobiology focuses on the structure, synthesis, biology, and evolution of sugars. It encompasses carbohydrate chemistry, the enzymology of glycan formation and degradation, protein-glycan recognition, and the role of glycans in biological systems. This field is closely connected to basic research, biomedicine, and biotechnology.