Date published: 2026-2-2

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SM-21 maleate (CAS 155058-71-2)

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Alternate Names:
(±)-Tropanyl 2-(4-chlorophenoxy)butanoate maleate
Application:
SM-21 maleate is potent and selective σ2 antagonist, increasing release of ACh
CAS Number:
155058-71-2
Purity:
≥98%
Molecular Weight:
453.92
Molecular Formula:
C18H24ClNO3•C4H4O4
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data.

QUICK LINKS

SM-21 maleate is a potent and selective σ receptor (σ2) antagonist with central effects following systemic administration. SM-21 maleate increases release of acetylcholine at central muscarinic synapses. SM-21 maleate is a potent analgesic (efficacy comparable to morphine) and nootropic agent.


SM-21 maleate (CAS 155058-71-2) References

Ghelardini et al (1997) Antinociceptive profile of 3-a-tropanyl-(2-Cl)-acid phenoxybutyrate (SM-21): a novel analgesic with a presynaptic cholinergic mechanism of action. J.Pharmacol.Exp.Ther. 282 430. Ghelardini et al (2000) Pharmacological identification of SM-21, the novel s2 antagonist. Pharmacol.Biochem.Behav. 67 659. Matsumoto and Mack (2001) (±)-SM 21 attenuates the convulsive and locomotor stimulatory effects of cocaine in mice. Eur.J.Pharmacol. 417 R1.

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

SM-21 maleate, 10 mg

sc-204289
10 mg
$157.00

SM-21 maleate, 50 mg

sc-204289A
50 mg
$651.00