1-Methylxanthine is a caffeine derivative. 1-Methylxanthine is an essential human urinary metabolite of caffeine and theophylline (1,3-dimethylxanthine, TP).

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.

Stearoylcarnitine (Stearoyl-L-carnitine) is a fatty ester lipid molecule, a human endogenous metabolite that serves as a biomarker for early-onset preeclampsia and late-onset preeclampsia.