DL-5-Hydroxylysine hydrochloride (5-hydroxylysine hydrochloride) is a racemic mixture of D- and L- enantiomers of 5-hydroxylysine which may be used as potential target markers for radical-induced protein oxidation.

3-Methyladipic acid is a metabolite of the catabolism of phytanic acid. Patients with adult Refsums disease (ARD) are unable to detoxify phytanic acid by alpha-oxidation, and so the w-oxidation pathway is the only metabolic pathway available for phytanic

D-Sorbitol (Sorbitol) is a polyhydric alcohol with about half the sweetness of sucrose. D-Sorbitol occurs naturally and is also produced synthetically from glucose. It was formerly used as a diuretic and may still be used as a laxative and in irrigating solutions for some surgical procedures. It is also used in many manufacturing processes, as a pharmaceutical aid, and in several research applications.

3-Amino-2-oxazolidinone (AOZ) is the metabolite of Furazolidone . It is always be detected as a indicator of furazolidone residues in vivo.

2,6-Dibromophenol (2,6-Dibromo-phenol) is extracted from the skin and muscle of flatfish.