Vitamin U (Methylmethionine chloride) is a vitamin found in green vegetables. It is used in the treatment of peptic ulcers, colitis, and gastritis and has an effect on secretory, acid-forming, and enzymatic functions of the intestinal tract.

Ibudilast is a relatively non-selective phosphodiesterase inhibitor with anti-inflammatory and neuroprotective activities.

Iproniazid is a non-selective, irreversible monoamine oxidase (MAO) inhibitor (MAOI) that is used as an antidepressive agent.

Pyridoxal 5-phosphate monohydrate is an active vitamin B6 metabolite, which is a cofactor in many reactions of amino acid metabolism.

JZL 184 is the first selective inhibitor of monoacylglycerol lipase (MAGL) with IC50 of 8 nM.

(R)-Nepicastat HCl, the R-enantiomer of Nepicastat HCl, is a potent and selective inhibitor with IC50 of 25.1 nM and 18.3 nM for bovine and human dopamine-β-hydroxylase, with negligible affinity for twelve other enzymes and thirteen neurotransmitter receptors.

Cetilistat is a novel highly lipophilic benzoxazinone that inhibits gastrointestinal and pancreatic lipases. It shows a good safety and tolerability profile in vivo

Aminooxyacetic acid is an inhibitor of aminobutyrate aminotransferase involved in amino acid and polyamine metabolism.