Safinamide (FCE-26743) is a reversible and selective monoamine oxidase B (IC50 0.098μM) inhibitor, reducing the degradation of dopamine, and a glutamate release inhibitor (IC50 8μM). It also inhibits dopamine reuptake. Safinamide also blocks sodium and calcium channels. Potential additional uses of Safinamide might be Parkinson's disease, restless leg syndrome and epilepsy.

Isatin (2,3-Indolinedione) is an endogenous MAO inhibitor.

Hydralazine hydrochloride (Apresoline) is the hydrochloride salt of hydralazine, a phthalazine derivative with antihypertensive and potential antineoplastic activities. Hydralazine alters intracellular calcium release and interferes with smooth muscle cell calcium influx, resulting in arterial vasodilatation. This agent also inhibits the phosphorylation of myosin protein and chelation of trace metals required for smooth muscle contraction, resulting in an increase in heart rate, stroke volume, and cardiac output. In addition to its cardiovascular effects, hydralazine inhibits DNA methyltransferase, which may result in inhibition of DNA methylation in tumor cells.

Furazolidone (Furoxone), a nitrofuran derivative, inhibits AML1-ETO transformed cells with IC50 value of 12.7 μM. It is antibacterial and antiprotozoal activity,

Methylene Blue (Tetramethylthionine chloride) (IC50 of 1.9 μM) inhibits tau filament formation. And it inhibits soluble guanylyl cyclase. It is also used as a dye in chromoendoscopy.

1,4-Naphthoquinone (P-Naphthoquinone) was used as a potential inhibitor of monoamine oxidase and DNA topoisomerase activities[2]. It was also used to inhibit the acetyltransferase activity[1].

Allylthiourea (Thiosinamine), a metabolic inhibitor, specifically suppresses ammonia oxidation.

Harmine (Telepathine) is an alkaloid isolated from seeds of Peganum harmala.