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MAO Inhibitors

Cat.No. Product Name Information Product Use Citations Product Validations
S3273 Hypericin Hypericin (Hyp, HY) is a naturally occurring substance found in the common St. John's Wort (Hypericum species) with antidepressive, antineoplastic and antiviral (human immunodeficiency and hepatitis C virus) activities. This compound has inhibitory effects on MAO (monoaminoxidase), PKC (protein kinase C), dopamine-beta-hydroxylase, reverse transcriptase, telomerase and CYP (cytochrome P450).
Eur J Pharmacol, 2021, 900:174071
S5795 Rasagiline Rasagiline (TVP-1012) is a novel selective and irreversible MAO-B propargylamine inhibitor with in vitro IC50s of 4.43 nM and 412 nM for MAO-B and MAO-A, respectively.
EMBO Mol Med, 2021, e13929
S6462 Amezinium (methylsulfate) Amezinium is a sympathomimetic used for its vasopressor effects in the treatment of hypotensive states. It is a MAO inhibitor, antagonizes the response to tyramine and blocks neuronal uptake of noradrenaline.
J Immunother Cancer, 2024, 12(11)e009805
E2231 Xanthoangelol Xanthoangelol, a chalcone found in the roots of Angelica keiskei, is a nonselective monoamine oxidase (MAO) inhibitor and a potent dopamine β-hydroxylase (DBH) inhibitor. It has anti-inflammatory, antibiotic and pro-apoptotic activities.
Int J Biol Macromol, 2024, S0141-8130(24)09341-3
S1472 Safinamide Mesylate Safinamide Mesylate (PNU-151774E, FCE28073) is mesylate salt of Safinamide, selectively and reversibly inhibits MAO-B with IC50 of 98 nM, exhibits 5918-fold selectivity against MAO-A. Phase 3.
S4856 Iproniazid Iproniazid (Marsilid, Iprazid) is a non-selective, irreversible monoamine oxidase (MAO) inhibitor (MAOI) that is used as an antidepressive agent.
S5357 Safinamide Safinamide (EMD-1195686, PNU-15774E) is an orally active, selective, reversible monoamine oxidase-B inhibitor with both dopaminergic and non-dopaminergic (glutamatergic) properties. The IC50 value of this compound for MAO-B is 98 nM.
S3291 Myristicin Myristicin (Myristicine), a terpene-like active component in Nutmeg which is the seed of Myristica fragrans, is a weak inhibitor of monamine oxidase (MAO) and a mechanism-based inhibitor of CYP1A2.
E4823 Pargyline Pargyline is an irreversible selective inhibitor of monoamine oxidase (MAO) with Kis of 13 μM and 0.5 μM for MAO-A and MAO-B respectively. It has pharmaceutical potential as an anticancer drug for human prostate cancer.
S6602 TB5 TB5 is a potent and selective MAO-B inhibitor with Ki values of 110 and 1,450 nM for MAO-B and MAO-A, respectively.
S5663 Minaprine dihydrochloride Minaprine dihydrochloride is hydrochloride salt form of Minaprine, which acts as a reversible inhibitor of MAO-A in rats and weakly inhibit acetylcholinesterase in rat brain (striatum) homogenates.
E0165 Phenelzine sulfate

Phenelzine Sulfate is a hydrazine derivative and acts as a potent non-selective monoamine oxidase (MAO) inhibitor with an IC50 of 0.9 μM.
E0009 Harmane Harmane (Harman, Aribine, Aribin, Locuturine, Locuturin, Loturine, Passiflorin, 1-Methylnorharman, NSC 54439) is a common compound in several foods, plants and beverages. This compound is a selective monoamine oxidase inhibitors with IC50s of 0.5 μM and 5 μM for human MAO A and MAO B, respectively. It also inhibits the apurinic/apyrimidinic (AP) endonuclease activity of the UV endonuclease induced by phage T4.
S9463 Demecarium Bromide Demecarium Bromide, an anticholinesterase, is an inhibitor of monoamine oxidase (MAO). It induces long-term miosis and decreases intraocular pressure (IOP) in normotensive eyes of Beagles and of eyes of Beagles with inherited glaucoma.
S6422 Lazabemide Lazabemide (Ro 19-6327) is a reversible and selective inhibitor of monoamine oxidase B (MAO-B) with Ki value of 7.9 nM.
S0160 Toloxatone (MD69276) Toloxatone (MD69276, Humoryl, Perenum, Umoril) is a reversible inhibitor of monoamine oxidase A (MAO-A) with IC50 of  0.93 µM. It is an antidepressant agent.
E7991 Harmol Harmol is a β-carboline alkaloid and a potent inhibitor of human monoamine oxidase (MAO), promotes TFEB nuclear translocation, restoring autophagic flux and lysosomal biogenesis, and enhances α-synuclein degradation via the autophagy-lysosome pathway. It also exhibits antifungal, antitumoral, antiviral, antioxidant, and neuroprotective activities, supporting its potential in Parkinson’s disease treatment.
E2226 4-Hydroxyderricin 4-Hydroxyderricin(4-HD), the major active ingredients of Angelica keiskei Koidzumi, is a potent selective monoamine oxidase (MAO) inhibitor with mild inhibitory effect on dopamine β-hydroxylase.
E3737 Passiflora caerulea Linnaeus Extract Passiflora caerulea Linnaeus Extract is drawed from Passiflora caerulea L., which contains higher amounts of the monoamine oxidase (MAO)-inhibitor harmine compared to Passiflora incarnate.
S2419 Eprobemide Eprobemide is a reversible monoamine oxidase A (MAO-A) inhibitor. This compound acts as an antidepressant in Russia.
S4483 Iproniazid phosphate Iproniazid (Marsilid, Iprazid) phosphate is a non-selective, irreversible monoamine oxidase (MAO) inhibitor (MAOI) that is used as an antidepressive agent.
E0784 MAO-B-IN-2 MAO-B-IN-2 is a selective and competitive inhibitor of MAO-B and BChE with IC50 values of 0.51 and 7.00 μM, respectively.
S2302 Glycyrrhizin (Glycyrrhizic Acid, NSC 167409) Glycyrrhizin (NSC 167409, Glycyrrhizic Acid) is a direct HMGB1(high mobility group box 1) inhibitor that inhibits HMGB1-dependent inflammatory molecule expression and oxidative stress; modulates P38 and P-JNK but not p-ERK signalling; Also inhibits 11 beta-hydroxysteroid dehydrogenase and monoamine oxidase (MAO).
Nat Commun, 2025, 16(1):2513
Chin Med J (Engl), 2025, 138(1):79-92
Oncol Rep, 2025, 54(3)106
Verified customer review of Glycyrrhizin (Glycyrrhizic Acid, NSC 167409)
S3868 Harmine Harmine (Telepathine), a fluorescent harmala alkaloid belonging to the beta-carboline family of compounds, is a highly cell-permeant and competitive inhibitor of ATP binding to the kinase pocket of DYRK1A, with about 60-fold higher IC50 value for DYRK2. This compound also inhibits monoamine oxidases (MAOs), PPARγ and cdc-like kinases (CLKs). It inhibits 5-HT2A serotonin receptor with Ki of 397 nM.
Cell Rep Med, 2025, 6(8):102297
Bone Res, 2025, 13(1):62
J Cell Mol Med, 2025, 29(15):e70774
S3817 Harmine hydrochloride Harmine (Telepathine), a fluorescent harmala alkaloid belonging to the beta-carboline family of compounds, is a highly cell-permeant and competitive inhibitor of ATP binding to the kinase pocket of DYRK1A, with about 60-fold higher IC50 value for DYRK2. Harmine also inhibits monoamine oxidases (MAOs), PPARγ and cdc-like kinases (CLKs). Harmine inhibits 5-HT2A serotonin receptor with Ki of 397 nM.
Cell Death Discov, 2025, 11(1):282
Cancers (Basel), 2022, 14(2)326
S9894 Vafidemstat Vafidemstat(ORY-2001) is a potent, selective, brain-penetrant dual inhibitor of lysine-specific histone demethylase (LSD1, KDM1A) and MAO-B, with IC50 values of 105 nM and 58 nM, respectively. It shows potential for treating memory deficits and behavioral alterations in neurodegenerative and psychiatric diseases.
E4805 Methylene Blue trihydrate Methylene blue trihydrate (C.I. Basic Blue 9 trihydrate) acts as an inhibitor of soluble guanylyl cyclase (sGC), monoamine oxidase A (MAO-A) and NO synthase (NOS). Methylene blue trihydrate exhibits antimalarial, antidepressant, and anxiolytic activity effects. Methylene Blue trihydrate has potential applications in treating methemoglobinemia, neurodegenerative disorders, and ifosfamide-induced encephalopathy.