D-Desthiobiotin is a biotin derivative used in affinity chromatography and protein chromatography. It can also be used for protein, cell labeling, detection, and separation.

1H-Indole-3-carboxaldehyde also known as 3-formylindole or 3-indolealdehyde belongs to the class of organic compounds known as indoles. Indoles are compounds containing an indole moiety which consists of pyrrole ring fused to benzene to form 23-benzopyrrole.

Phosphorylcholine is a small haptenic molecule is found in a wide variety of organisms. Human hepatic tumors undergo an elevation in the concentration of phosphorylcholine as the principal metabolic change is observed .