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Catalog No. Product Name Information Product Use Citations Product Validations
S2302 Glycyrrhizin (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
Cell Mol Life Sci, 2024, 81(1):408
S4246 Tranylcypromine HCl Tranylcypromine HCl is a monoamine oxidase inhibitor, which inhibits CYP2A6 with Ki of 0.08 μM and 0.2 μM in cDNA-expressing microsomes and Human Liver Microsomes, respectively.
Sci Bull (Beijing), 2024, S2095-9273(24)00799-0
Cell Rep, 2023, 42(6):112566
Biomolecules, 2023, 13(3)521
S9464 Tranylcypromine Sulfate Tranylcypromine Sulfate is an irreversible inhibitor of monoamine oxidase (MAO) with a rapid onset of activity.
Int J Mol Sci, 2022, 23(8)4213
Nan Fang Yi Ke Da Xue Xue Bao, 2021, 41(3):418-423
Nat Methods, 2020, 17(5):495-503
S3212 Moclobemide (Ro 111163) Moclobemide is a MAO-A (5-HT) inhibitor with IC50 of 6.1 μM.
J Gerontol A Biol Sci Med Sci, 2022, 77-8:1485-1493
Biol Reprod, 2021, ioab182
Pharmacol Biochem Behav, 2018, 166:13-20
S2102 Rasagiline Mesylate Rasagiline Mesylate (TVP-1012,(R)-AGN1135 mesylate,TVP1012 mesylate) is a new MAO-B inhibitor for the treatment of idiopathic Parkinson's disease.
J Immunother Cancer, 2024, 12(11)e009805
Front Pharmacol, 2022, 13:1004215
EMBO Mol Med, 2021, e13929
S4033 Sennoside A Sennoside A (NSC 112929), a kind of irritant laxative isolated from rhei rhizome, causes purgative actions in the intestine.
Sci Adv, 2022, 8(15):eabm3471
Front Pharmacol, 2020, 11:566099
S3690 Pargyline hydrochloride Pargyline is an irreversible inhibitor of monoamine oxidase (MAO)-B with Ki values of 13 and 0.5 μM for time-dependent inhibition of the activity of MAO-A and -B, respectivey.
J Immunother Cancer, 2024, 12(11)e009805
Genome Med, 2021, 13(1):168
Cancer Lett, 2017, 398:12-21
S2339 Paeonol Paeonol (Peonol), a phenolic compound extracted from Chinese herbs Paeonia suffruticosa (moutan cortex) and Cynanchum paniculatum, inhibits MAO with an IC50 of about 50 μM.
Biochem Biophys Res Commun, 2023, 656:86-96
Int J Biol Sci, 2019, 15(11):2497-2508
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. Harmine also inhibits monoamine oxidases (MAOs), PPARγ and cdc-like kinases (CLKs). Harmine inhibits 5-HT2A serotonin receptor with Ki of 397 nM.
J Gerontol A Biol Sci Med Sci, 2022, 77-8:1485-1493
Cell Death Dis, 2019, 10(12):899
S5269 J147 J147, a curcumin derivative, is a potent neurogenic and neuroprotective compound developed for the treatment of neurodegenerative conditions associated with aging.
J Mol Histol, 2023, 54(6):725-738.
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.
Cancers (Basel), 2022, 14(2)326
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
S4717 Isatin Isatin (2,3-Indolinedione) is an endogenous MAO inhibitor with an IC50 of 15 μM and more active against MAO-B than MAO-A.
Cell Rep, 2022, 38(13):110559
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 safinamide for MAO-B is 98 nM.
E2632 Norharmane Norharmane (Norharman) is a potent and selective monoamine oxidase A (MAO-A) inhibitor with a Ki of 3.34 μM.
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. Hypericin 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
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.
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.
A2408 Simtuzumab (Anti-LOXL2) Simtuzumab (Anti-LOXL2) is a monoclonal antibody directed against Lysyl oxidase like-2 (LOXL2) with potential antineoplastic activity. MW: 145.5 kD.
E4823New 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. Harmane is a selective monoamine oxidase inhibitors with IC50s of 0.5 μM and 5 μM for human MAO A and MAO B, respectively. Harmane 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.
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.
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. Toloxatone is an antidepressant agent.
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.
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
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. Eprobemide 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 (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
Cell Mol Life Sci, 2024, 81(1):408
S4246 Tranylcypromine HCl Tranylcypromine HCl is a monoamine oxidase inhibitor, which inhibits CYP2A6 with Ki of 0.08 μM and 0.2 μM in cDNA-expressing microsomes and Human Liver Microsomes, respectively.
Sci Bull (Beijing), 2024, S2095-9273(24)00799-0
Cell Rep, 2023, 42(6):112566
Biomolecules, 2023, 13(3)521
S9464 Tranylcypromine Sulfate Tranylcypromine Sulfate is an irreversible inhibitor of monoamine oxidase (MAO) with a rapid onset of activity.
Int J Mol Sci, 2022, 23(8)4213
Nan Fang Yi Ke Da Xue Xue Bao, 2021, 41(3):418-423
Nat Methods, 2020, 17(5):495-503
S3212 Moclobemide (Ro 111163) Moclobemide is a MAO-A (5-HT) inhibitor with IC50 of 6.1 μM.
J Gerontol A Biol Sci Med Sci, 2022, 77-8:1485-1493
Biol Reprod, 2021, ioab182
Pharmacol Biochem Behav, 2018, 166:13-20
S2102 Rasagiline Mesylate Rasagiline Mesylate (TVP-1012,(R)-AGN1135 mesylate,TVP1012 mesylate) is a new MAO-B inhibitor for the treatment of idiopathic Parkinson's disease.
J Immunother Cancer, 2024, 12(11)e009805
Front Pharmacol, 2022, 13:1004215
EMBO Mol Med, 2021, e13929
S4033 Sennoside A Sennoside A (NSC 112929), a kind of irritant laxative isolated from rhei rhizome, causes purgative actions in the intestine.
Sci Adv, 2022, 8(15):eabm3471
Front Pharmacol, 2020, 11:566099
S3690 Pargyline hydrochloride Pargyline is an irreversible inhibitor of monoamine oxidase (MAO)-B with Ki values of 13 and 0.5 μM for time-dependent inhibition of the activity of MAO-A and -B, respectivey.
J Immunother Cancer, 2024, 12(11)e009805
Genome Med, 2021, 13(1):168
Cancer Lett, 2017, 398:12-21
S2339 Paeonol Paeonol (Peonol), a phenolic compound extracted from Chinese herbs Paeonia suffruticosa (moutan cortex) and Cynanchum paniculatum, inhibits MAO with an IC50 of about 50 μM.
Biochem Biophys Res Commun, 2023, 656:86-96
Int J Biol Sci, 2019, 15(11):2497-2508
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. Harmine also inhibits monoamine oxidases (MAOs), PPARγ and cdc-like kinases (CLKs). Harmine inhibits 5-HT2A serotonin receptor with Ki of 397 nM.
J Gerontol A Biol Sci Med Sci, 2022, 77-8:1485-1493
Cell Death Dis, 2019, 10(12):899
S5269 J147 J147, a curcumin derivative, is a potent neurogenic and neuroprotective compound developed for the treatment of neurodegenerative conditions associated with aging.
J Mol Histol, 2023, 54(6):725-738.
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.
Cancers (Basel), 2022, 14(2)326
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
S4717 Isatin Isatin (2,3-Indolinedione) is an endogenous MAO inhibitor with an IC50 of 15 μM and more active against MAO-B than MAO-A.
Cell Rep, 2022, 38(13):110559
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 safinamide for MAO-B is 98 nM.
E2632 Norharmane Norharmane (Norharman) is a potent and selective monoamine oxidase A (MAO-A) inhibitor with a Ki of 3.34 μM.
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. Hypericin 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
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.
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.
E4823New 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. Harmane is a selective monoamine oxidase inhibitors with IC50s of 0.5 μM and 5 μM for human MAO A and MAO B, respectively. Harmane 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.
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.
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. Toloxatone is an antidepressant agent.
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.
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
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. Eprobemide 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.
A2408 Simtuzumab (Anti-LOXL2) Simtuzumab (Anti-LOXL2) is a monoclonal antibody directed against Lysyl oxidase like-2 (LOXL2) with potential antineoplastic activity. MW: 145.5 kD.
E4823New 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.

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