α-Methylserotonin maleate salt

≥98% (HPLC)

α-Methyl-5-hydroxytryptamine maleate salt, (±)-3-(2-Aminopropyl)indol-5-ol maleate salt
Empirical Formula (Hill Notation):
C11H14N2O · C4H4O4
CAS Number:
Molecular Weight:
MDL number:
PubChem Substance ID:
Pricing and availability is not currently available.

Quality Level


≥98% (HPLC)




white to beige


H2O: >3 mg/mL, clear (warmed)

storage temp.


SMILES string




InChI key


Gene Information

human ... HTR2A(3356), HTR2B(3357), HTR2C(3358)

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10, 50, 100 mg in glass bottle

Biochem/physiol Actions

5-HT2 serotonin receptor agonist.

Features and Benefits

This compound is also offered as part of Sigma′s Library of Pharmacologically Active Compounds (LOPAC®1280), a biologically annotated collection of high-quality, ready-to-screen compounds. Click here to learn more.

Legal Information

LOPAC is a registered trademark of Sigma-Aldrich Co. LLC

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
P D Feldman
Journal of the autonomic nervous system, 56(1-2), 119-124 (1995-12-05)
Spontaneous neuronal activity in the solitary tract nucleus was recorded extracellularly in a brain slice preparation during bath-application of 5-HT1 and 5-HT2 receptor-selective agonists and antagonists. The 5-HT1A/5-HT1B agonist 5-carboxamidotryptamine depressed activity in 20 of 25 neurons studied. The remaining...
A M Ismaiel et al.
Journal of medicinal chemistry, 33(2), 755-758 (1990-02-01)
alpha-Methyl-5-hydroxytryptamine (alpha-Me-5-HT; 2) and 2-methyl-5-hydroxytryptamine (2-Me-5-HT; 3) are considered to be 5-HT2-selective and 5-HT3-selective agents, respectively. These agents were synthesized and examined at serotonin (5-HT) binding sites because there is relatively little documentation as to their selectivity and because they...
Ralf Buettner et al.
Molecular therapy oncolytics, 14, 149-158 (2019-06-19)
The immunosuppressive agent leflunomide has been used in the treatment of over 300,000 patients with rheumatoid arthritis. Its active metabolite, teriflunomide (Ter), directly inhibits dihydroorotate dehydrogenase (DHODH), an enzyme involved in nucleoside synthesis. We report that Ter not only shows...
G P Leung et al.
The Journal of physiology, 519 Pt 3, 657-667 (1999-08-24)
1. The short-circuit current (Isc) technique was used to study the role of 5-hydroxytryptamine (5-HT) in the regulation of anion secretion in cultured rat cauda epididymal epithelia. 2. 5-HT, the 5-HT1B-selective agonist 5-nonyloxytryptamine (5-NOT) and the 5-HT2B-selective agonist alpha-methyl-5-hydroxytryptamine (alpha-methyl-5-HT)...

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