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U-18666A #68998

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U-18666A: Image 1
Chemical structure of U-18666A.

Product Usage Information

U-18666A is supplied as a lyophilized powder. For a 10 mM stock, reconstitute 5 mg of powder in 1.17 ml of water. 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 424.1 g/mol
Purity >98%
Molecular Formula C25H41NO2 • HCl
CAS 3039-71-2
Solubility Soluble in water at 20 mg/ml.


U-18666A is a cell permeable drug that inhibits cholesterol transport. This small molecule inhibits low density lipoprotein (LDL)-derived cholesterol transport, blocking cholesterol esterification, and suppressing LDL receptor activities (1). Studies have shown that impaired cholesterol trafficking is associated with neurological diseases such as Alzheimer’s disease (AD), Niemann-Pick disease type C (NPC), and atherosclerosis (2,3). The mechanisms of neurodegeneration for these diseases are mostly unknown so studies using U-18666A to simulate intracellular cholesterol accumulation may provide greater insight into these pathologies (2). Cholesterol levels play a role in the body’s response to viral infection and the ability of a virus to enter and replicate within a host cell, making U-18666A an important compound when studying different viral diseases (4).
  1. Liscum, L. and Faust, J.R. (1989) J Biol Chem 264, 11796-806.
  2. Koh, C.H. and Cheung, N.S. (2006) Cell Signal 18, 1844-53.
  3. Tabas, I. (2004) Cell Death Differ 11 Suppl 1, S12-6.
  4. Poh, M.K. et al. (2012) Antiviral Res 93, 191-8.

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.
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To Purchase # 68998
Cat. # Size Qty. Price
5 mg

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