View Featured Offers >>
Activators & Inhibitors
Chemical Modulators

Entacapone #96692

Reviews ()
Citations (0)
Entacapone: Image 1
Chemical structure of Entacapone.

Product Usage Information

Entacapone is supplied as a lyophilized powder. For a 30 mM stock, reconstitute 10 mg of powder in 1.09 ml of DMSO. Working concentrations and length of treatment can vary depending on the desired effect.


Store lyophilized at -20ºC, desiccated. In lyophilized form, the chemical is stable for 24 months. Once in solution, store at -20ºC and use within 1 month to prevent loss of potency. Aliquot to avoid multiple freeze/thaw cycles.

Product Description

Molecular Weight 305.3 g/mol
Purity >98%
Molecular Formula C14H15N3O5
CAS 130929-57-6
Solubility Soluble in DMSO at 30 mg/ml or ethanol at 3 mg/ml.


Entacapone, also known as OR-611, is a catechol O-methyltransferase (COMT) inhibitor with IC50 values ranging from 10 nM to 160 nM for rat duodenum and rat liver COMT, respectively (1,2). Taken as an adjuvant with levodopa/carbidopa therapy, entacapone blocks COMT methylation and subsequent degradation of plasma levodopa, prolonging and improving therapeutic response in Parkinson’s patients (3,4). Entacapone inhibition of COMT also works synergistically with (-)-Epigallocatechin-3-gallate (EGCG) to inhibit human and murine lung cancer cell growth in vitro (5).
  1. Männistö, P.T. et al. (1992) Br J Pharmacol 105, 569-74.
  2. Nissinen, E. et al. (1992) Naunyn Schmiedebergs Arch Pharmacol 346, 262-6.
  3. Najib, J. (2001) Clin Ther 23, 802-32; discussion 771.
  4. Trenkwalder, C. et al. (2019) Neurology 92, e1487-e1496.
  5. Forester, S.C. and Lambert, J.D. (2014) Carcinogenesis 35, 365-72.

Limited Uses

Except as otherwise expressly agreed in a writing signed by a legally authorized representative of CST, the following terms apply to Products provided by CST, its affiliates or its distributors. Any Customer's terms and conditions that are in addition to, or different from, those contained herein, unless separately accepted in writing by a legally authorized representative of CST, are rejected and are of no force or effect.

Products are labeled with For Research Use Only or a similar labeling statement and have not been approved, cleared, or licensed by the FDA or other regulatory foreign or domestic entity, for any purpose. Customer shall not use any Product for any diagnostic or therapeutic purpose, or otherwise in any manner that conflicts with its labeling statement. Products sold or licensed by CST are provided for Customer as the end-user and solely for research and development uses. Any use of Product for diagnostic, prophylactic or therapeutic purposes, or any purchase of Product for resale (alone or as a component) or other commercial purpose, requires a separate license from CST. Customer shall (a) not sell, license, loan, donate or otherwise transfer or make available any Product to any third party, whether alone or in combination with other materials, or use the Products to manufacture any commercial products, (b) not copy, modify, reverse engineer, decompile, disassemble or otherwise attempt to discover the underlying structure or technology of the Products, or use the Products for the purpose of developing any products or services that would compete with CST products or services, (c) not alter or remove from the Products any trademarks, trade names, logos, patent or copyright notices or markings, (d) use the Products solely in accordance with CST Product Terms of Sale and any applicable documentation, and (e) comply with any license, terms of service or similar agreement with respect to any third party products or services used by Customer in connection with the Products.

For Research Use Only. Not For Use In Diagnostic Procedures.
Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
All other trademarks are the property of their respective owners. Visit our Trademark Information page.
To Purchase # 96692
Cat. # Size Qty. Price
10 mg
$ 65