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U 18666A

CAS No.
3039-71-2
Chemical Name:
U 18666A
Synonyms
U 18666A;U18666A,HCl;U18666A, 10 mM in DMSO;U18666A - CAS 3039-71-2 - Calbiochem;U-18666A, cholesterol transport inhibitor;3BETA-(2-DIETHYLAMINOETHOXY)-ANDROSTENONE HCL;3BETA-(2-DIETHYLAMINOETHOXY)ANDROST-5-EN-17 ONE, HCL;3BETA-(2-DIETHYLAMINO-ETHOXY)ANDROSTENONE HYDROCHLORIDE;3β-(2-Diethylaminoethoxy)androst-5-en-17-one hydrochloride;(3β)-3-[2-(Diethylamino)ethoxy]androst-5-en-17-onehydrochloride
CBNumber:
CB1467459
Molecular Formula:
C25H41NO2.ClH
Molecular Weight:
424.06
MDL Number:
MFCD00210908
MOL File:
3039-71-2.mol
MSDS File:
SDS
TDS File:
TDS
Last updated:2026-07-27 17:00:41

U 18666A Properties

Melting point 195-196.5 °C(lit.)
storage temp. 2-8°C
solubility H2O: 9 mg/mL at ≤60 °C
form crystalline
color white
Water Solubility Soluble in water at 10mg/ml
Stability Stable for 2 years from date of purchase as supplied. Solutions in DMSO or distilled water may be stored at -20°C for up to 1 week.
InChI 1S/C25H41NO2.ClH/c1-5-26(6-2)15-16-28-19-9-7-18-8-10-20-21-11-12-23(27)24(21,3)14-13-22(20)25(18,4)17-19;/h8,19-22H,5-7,9-17H2,1-4H3;1H
InChIKey ICPRVJHNLABCSA-UHFFFAOYSA-N
SMILES [Cl-].N(CCOC1CC2(C3C(C4C(CC3)(C(=O)CC4)C)CC=C2CC1)C)(CC)CC.[H+]
FDA UNII V0DPR5J8ZJ
UNSPSC Code 12352200
NACRES NA.77

SAFETY

Risk and Safety Statements

Safety Statements  22-24/25
WGK Germany  3
Storage Class 11 - Combustible Solids

U 18666A price More Price(58)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich U3633 U 18666A powder 3039-71-2 5mg $141 2026-04-30 Buy
Sigma-Aldrich 662015 U18666A 3039-71-2 10mg $199 2026-04-30 Buy
Cayman Chemical 10009085 U-18666A ≥95% 3039-71-2 5mg $53 2026-04-30 Buy
Cayman Chemical 10009085 U-18666A ≥95% 3039-71-2 10mg $98 2026-04-30 Buy
Cayman Chemical 10009085 U-18666A ≥95% 3039-71-2 25mg $231 2026-04-30 Buy
Product number Packaging Price Buy
U3633 5mg $141 Buy
662015 10mg $199 Buy
10009085 5mg $53 Buy
10009085 10mg $98 Buy
10009085 25mg $231 Buy

U 18666A Chemical Properties, Uses, Production

Description

U-18666A (3039-71-2) is an oxidosqualene reductase inhibitor.1 Inhibits the egress of cholesterol from late endosomes and lysosomes.2 U-18666A is also used to study Niemann-Pick disease and for assessing the importance of molecular trafficking through the lysosomal pathway in other conditions.3

Uses

U 18666A is a cell-permeable amphiphilic amino-steroid.

Definition

ChEBI: 3beta-(2-diethylaminoethoxy)androst-5-en-17-one hydrochloride is a hydrochloride obtained by reaction of 3beta-(2-diethylaminoethoxy)androst-5-en-17-one with one equivalent of hydrochloric acid. It is a cholesterol synthesis and transport inhibitor. It has a role as an EC 1.3.1.72 (Delta(24)-sterol reductase) inhibitor, a nicotinic antagonist, a sterol biosynthesis inhibitor, an antiviral agent and a Hedgehog signaling pathway inhibitor. It contains a 3beta-(2-diethylaminoethoxy)androst-5-en-17-one(1+).

General Description

A cell-permeable, amphiphilic amino-steroid that alters intracelluar membrane protein trafficking by impairing intracellular biosynthesis and transport of LDL-derived cholesterol. Reported to exert its effects via the inhibition of 2,3-oxidosqualene-lanosterol cyclase activity. Also reported to inhibit the activity of Δ8-sterol isomerase.

Biological Activity

Inhibitor of cholesterol synthesis and cellular transport, and weak inhibitor of hedgehog (Hh) signaling. Reduces serum sterol levels in rats in vivo .

Biochem/physiol Actions

Cell permeable: yes

storage

Desiccate at RT

Background

U-18666A is a cell permeable drug that inhibits cholesterol transport. This small molecule inhibits low density lipoprotein-derived cholesterol transport, blocking cholesterol esterification, and suppressing LDL receptor activities. Studies have shown that impaired cholesterol trafficking is associated with neurological diseases such as Alzheimer’s disease, Niemann-Pick disease type C, and atherosclerosis. 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. 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.

References

[1] RUSSELL C. SEXTON. Effects of 3.beta.-[2-(diethylamino)ethoxy]androst-5-en-17-one on the synthesis of cholesterol and ubiquinone in rat intestinal epithelial cell cultures[J]. Biochemistry Biochemistry, 1983, 22 25: 5687-5692. DOI:10.1021/bi00294a001
[2] L LISCUM  J R F. The intracellular transport of low density lipoprotein-derived cholesterol is inhibited in Chinese hamster ovary cells cultured with 3-beta-[2-(diethylamino)ethoxy]androst-5-en-17-one.[J]. The Journal of Biological Chemistry, 1989, 264 20: 11796-11806.
[3] CENEDELLA R J. Cholesterol Synthesis Inhibitor U18666A and the Role of Sterol Metabolism and Trafficking in Numerous Pathophysiological Processes[J]. Lipids, 2009, 44 6: 477-487. DOI:10.1007/s11745-009-3305-7

U 18666A Preparation Products And Raw materials

Raw materials

Preparation Products

U 18666A Suppliers

Global Suppliers ( 129)
Supplier Tel Email Country ProdList Advantage
3B Pharmachem (Wuhan) International Co.,Ltd. 18930552037 3bsc@sina.com China 15813 69
Dalian Meilun Biotech Co., Ltd. 0411-62910999 13889544652 sales@meilune.com China 4765 58
Guangzhou Isun Pharmaceutical Co., Ltd 020-39119399 18927568969 isunpharm@qq.com China 4773 55
Sigma-Aldrich 021-61415566 800-8193336 orderCN@merckgroup.com China 51389 80
Shanghai Lollane Biological Technology Co.,Ltd. 021-52996696,15000506266 15000506266 China 4859 55
EMMX Biotechnology LLC 888-539-0666 info@emmx.com United States 8435 60
Shanghai EFE Biological Technology Co., Ltd. 021-65675885 18964387627 info@efebio.com China 9799 58
Shanghai YuanYe Biotechnology Co., Ltd. 15026964105 2881489226@qq.com China 89667 60
ShangHai Biochempartner Co.,Ltd 177-54423994 17754423994 2853530910@QQ.com China 8000 62
Shanghai Rechem science Co., Ltd. 021-31433387 15618786686 sales@rechemscience.com China 2970 58

View Latest Price from U 18666A manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
U18666A pictures 2026-07-27 U18666A
3039-71-2
$61.00-185.00 99.79% 10g TargetMol Chemicals Inc.
  • U18666A pictures
  • U18666A
    3039-71-2
  • $61.00-185.00
  • 99.79%
  • TargetMol Chemicals Inc.

U 18666A Spectrum

U 18666A 3BETA-(2-DIETHYLAMINOETHOXY)ANDROST-5-EN-17 ONE, HCL 3BETA-(2-DIETHYLAMINOETHOXY)-ANDROSTENONE HCL 3BETA-(2-DIETHYLAMINO-ETHOXY)ANDROSTENONE HYDROCHLORIDE (3BETA)-3-[2-(DIETHYLAMINO)ETHOXY]ANDROST-5-EN-17-ONE DIHYDROCHLORIDE (3B)-3-[2-(DIETHYLAMINO)ETHOXY]ANDROST-5-EN-17-ONE HYDROCHLORIDE U18666A,HCl (3β)-3-[2-(diethylamino)ethoxy]androst-5-en-17-one dihydrochloride (3β)-3-[2-(Diethylamino)ethoxy]androst-5-en-17-onehydrochloride U18666A - CAS 3039-71-2 - Calbiochem (3β)-3-[2-(Diethylamino)ethoxy]androst-5-en-17-one hydrochloride U-18666A, cholesterol transport inhibitor U18666A, 10 mM in DMSO 3β-(2-Diethylaminoethoxy)androst-5-en-17-one hydrochloride 3039-71-2 C25H41NO2HCl C25H41NO22HCl C25H42ClNO2