Glucose oxidase, an enzyme extracted from the fungus Aspergillus niger, is an important industrial enzyme in the food industry and is widely used in the deoxygenation of foods such as wine, beer, fruit juice, milk powder, and in the improvement of flour and prevention of browning of foods, etc. It has antioxidant and potential anticancer activities.

3-Oxocholic acid(3-Ketocholic acid) is the metabolite of bile acid and the main product of bile degradation by Clostridium perfringens in the intestine.3-Oxocholic acid is a steroid acid mainly found in the bile of mammals.

CMP-Sialic acid sodium salt (CMP-Neu5Ac sodium salt) is a variant inhibitor of UDP-GlcNAc 2-epimerase, the activated form of sialic acid, which is widely found in animals and is involved in the metabolism of organisms.