Phenyl acetate (or phenylacetate) is a carboxylic acid ester that has been found in the biofluids of patients with nephritis and/or hepatitis as well as patients with phenylketonuria (PKU) an inborn error of metabolism. Excess phenylalanine in the body can be disposed of through a transamination process leading to the production of phenylpyruvate.

Uridine diphosphate glucuronic acid ammonium (UDP-α-D-glucuronic acid ammonium) is a precursor of many plant cell wall polysaccharides and is required for the production of seed mucilage.

6PPD-Q (6PPD-Quinone), a contaminant present in the environment and soil, is a derivative of the tire antioxidant N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine (6PPD), which impairs the quality of spermatozoa in mice and induces impaired male fertility.