Cibenzoline succinate

≥98% (HPLC), solid

Exacor, 2-(2,2-diphenylcyclopropyl)-4,5-dihydro-1H-imidazole succinate, Cibenol, Cipralan
Empirical Formula (Hill Notation):
C18H18N2 ·C4H6O4
CAS Number:
Molecular Weight:
MDL number:
PubChem Substance ID:
Pricing and availability is not currently available.

Quality Level


≥98% (HPLC)




white to brown


H2O: ≥5 mg/mL

storage temp.


SMILES string




InChI key


General description

Cibenzoline also called (±)-2-(2,2-diphenylcyclopropyl)-2-imidazoline succinate, is generally used in stereo combination of R(+) and S(−) forms. It also exhibits anticholinergic activity.. Cibenzoline is known to improve left ventricular diastolic dysfunction by reducing left ventricular pressure gradient.


10, 50 mg in glass bottle

Biochem/physiol Actions

Cibenzoline is a class IA antiarrhythmic drug. Cibenzoline (μM concentrations) blocks ATP-sensitive K channels in heart and pancreatic cells. Cibenzoline interacts with the channel pore-forming subunit of the K(ATP) channel (Kir6.2) from the cytoplasmic side. Cibenzoline also inhibits the delayed rectifier K current [I(Kr)] in sino-atrial node cells.

Features and Benefits

This compound is featured on the Potassium Channels page of the Handbook of Receptor Classification and Signal Transduction. To browse other handbook pages, click here.
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


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Signal Word


Hazard Statements

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
Perciliz L Tan et al.
Investigative ophthalmology & visual science, 58(3), 1570-1576 (2017-03-11)
Genome-wide association (GWAS) and sequencing studies for AMD have highlighted the importance of coding variants at loci that encode components of the complement pathway. However, assessing the contribution of such alleles to AMD, especially when they are rare, remains coarse...
Stereoselective metabolism of cibenzoline, an antiarrhythmic drug, by human and rat liver microsomes: possible involvement of CYP2D and CYP3A
Niwa T, et al.
Drug Metabolism and Disposition, 28(9), 1128-1134 (2000)
Cibenzoline for left ventricular outflow tract obstruction in tako-tsubo cardiomyopathy and hypertrophic cardiomyopathy
Anan R
Journal of Cardiology Cases, 11(6), 158-159 (2015)
Impact of chronic use of cibenzoline on left ventricular pressure gradient and left ventricular remodeling in patients with hypertrophic obstructive cardiomyopathy
Hamada M, et al.
Journal of Cardiology, 67(3), 279-286 (2016)
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