Brofaromine (CGP 11305A) is an MAO inhibitor (IC50: 0.2 μM for MAO-A).

1-Methyl-2-undecyl-4(1H)-quinolone, and dihydroevocarpine should also be served as the chemical markers together with evodiamine for the quality control of Evodia rutaecarpa (Juss.) Benth. 1-Methyl-2-undecyl-4(1H)-quinolone shows a selective inhibition of type B MAO (MAO-B) activity with the IC(50) value of 15.3 microM using a substrate kynuramine, but does not inhibit type A MAO (MAO-A) activity.It can mitigate high phosphate-induced human aortic valve interstitial cells (HAVICs) calcification by inhibiting phosphate cotransporter (PiT-1) gene expression. It also shows moderate antiangiogenic activity against human tumor cells.

Echitovenidine shows monoamine oxidase inhibitor activity.

5-Hydroxy-1-methoxyxanthone, 1,5-dihydroxyxanthone and 6-deoxyjacareubin are all antifungal against Cladosporium cucumerinum, while they show differing degrees of inhibition of monoamine oxidase A and B.

2'-O-Methylperlatolic acid and confluentic acid are monoamine oxidase B inhibitors in a Brazilian plant, Himatanthus sucuuba.

Lazabemide (Ro 19-6327) 是一种单胺氧化酶 B 的选择性的可逆抑制剂 ，但对 MAO-A 活性较低。它高浓度时具有抑制单胺摄取的作用，能够抑制去甲肾上腺素、血清素和多巴胺摄取，其IC50值分别为 86 μM、123 μM 和 >500 μM。它可用于研究帕金森和阿尔茨海默病。