Pyrrole-2-carboxylic acid was first identified as a degradation product of sialic acids then as a derivative of the oxidation of the D-hydroxyproline isomers by mammalian D-amino acid oxidase.

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.

GDP-L-fucose is a nucleotide sugar widely found in fungi and plants, playing a role in both the slave and secondary remedial metabolic pathways.