epi-Sancycline (hydrochloride) is a type of biochemical reagent utilized in glycobiology research. Glycobiology involves the study of the structure, synthesis, biology, and evolution of carbohydrates. 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 linked with fundamental research, biomedicine, and biotechnology.