Skip to Content
Merck
All Photos(1)

Key Documents

View All Documentation

N0663

Sigma-Aldrich

NS1643

≥98% (HPLC), solid

Sign Into View Organizational & Contract Pricing
All Photos(1)

About This Item

Empirical Formula (Hill Notation):
C15H10F6N2O3
CAS Number:
448895-37-2
Molecular Weight:
380.24
MDL number:
MFCD08705418
UNSPSC Code:
12352200
PubChem Substance ID:
24897438
NACRES:
NA.77

Quality Level

100

Assay

≥98% (HPLC)

form

solid

color

white to off-white

solubility

DMSO: ≥20 mg/mL

storage temp.

2-8°C

SMILES string

Oc1ccc(cc1NC(=O)Nc2cc(ccc2O)C(F)(F)F)C(F)(F)F

InChI

1S/C15H10F6N2O3/c16-14(17,18)7-1-3-11(24)9(5-7)22-13(26)23-10-6-8(15(19,20)21)2-4-12(10)25/h1-6,24-25H,(H2,22,23,26)

InChI key

NJFVQMRYJZHGME-UHFFFAOYSA-N

Biochem/physiol Actions

The new diphenylurea compound 1,3-bis-(2-hydroxy-5-trifluoromethyl-phenyl)-urea (NS1643) was tested in hERG channel. In Xenopus laevis oocytes, NS1643 increased both steady-state and tail current at all voltages tested. The EC50 value for hERG channel activation was 10.5 μM. The effect could be reverted by application of the specific hERG channel inhibitor 4′-[[1-[2-(6-methyl-2-pyridyl)ethyl]-4-piperidinyl]carbonyl]-methanesulfonanilide (E-4031) at 100 nM. Application of NS1643 also resulted in a prolonged postrepolarization refractory time. hERG channel activation by small molecules such as NS1643 increases the repolarization reserve and presents a new antiarrhythmic approach.

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.

Pictograms

Skull and crossbones
GHS06

Signal Word

Danger

Hazard Statements

H301,H319

Hazard Classifications

Acute Tox. 3 Oral - Eye Irrit. 2

Storage Class Code

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Sheeja Rajasingh et al.
Acta pharmacologica Sinica, 39(10), 1590-1603 (2018-04-06)
Induced pluripotent stem cell (iPSC)-based cardiac regenerative medicine requires the efficient generation, structural soundness and proper functioning of mature cardiomyocytes, derived from the patient's somatic cells. The most important functional property of cardiomyocytes is the ability to contract. Currently available
Serdar Durdagi et al.
Journal of molecular graphics & modelling, 74, 153-170 (2017-05-13)
The intra-cavitary drug blockade of hERG1 channel has been extensively studied, both experimentally and theoretically. Structurally diverse ligands inadvertently block the hERG1 K
K Lansu et al.
Cell death & disease, 4, e652-e652 (2013-06-08)
Traditionally the hERG1 potassium channel has been known to have a fundamental role in membrane excitability of several mammalian cells including cardiac myocytes. hERG1 has recently been found to be expressed in non-excitable cancer cells of different histogenesis, but the
Eun-Kyoung Breuer et al.
Cell death & disease, 10(3), 180-180 (2019-02-23)
Potassium ion channels are critical in the regulation of cell motility. The acquisition of cell motility is an essential parameter of cancer metastasis. However, the role of K+ channels in cancer metastasis has been poorly studied. High expression of the
H R Lu et al.
Journal of pharmacological and toxicological methods, 87, 53-67 (2017-05-16)
Human induced pluripotent stem cell-derived cardiomyocytes (hiPS-CMs) are emerging as new and human-relevant source in vitro model for cardiac safety assessment that allow us to investigate a set of 20 reference drugs for predicting cardiac arrhythmogenic liability using optical action
View All Related Papers

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service