Pantolactone belongs to the class of organic compounds known as gamma-butyrolactones. gamma-Butyrolactones are compounds containing a gamma-butyrolactone moiety which consists of an aliphatic five-member ring with four carbon atoms one oxygen atom and bears a ketone group on the carbon adjacent to the oxygen atom.

Etrolizumab (rhuMAb Beta7), a gut-selective anti-β7 integrin monoclonal antibody, targets the β7 subunit of α4β7 and αEβ7 integrins specifically, demonstrating affinity with K i values of 18 nM for Human α4β7 and 1800 pM for Human αEβ7-293.

NεNεNε-Trimethyl-L-lysine is a methylated derivative of the amino acid lysine. It is a component of histone proteins a precursor of carnitine and a coenzyme of fatty acid oxidation. NεNεNε--Trimethyl-L-lysine residues are found in a number of proteins and are generated by the action of S-adenosyl-L-methionine on exposed lysine residues.