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Key Documents

SML0836

Sigma-Aldrich

ML297

≥98% (HPLC)

Synonym(s):

1-(3,4-Difluorophenyl)-3-(3-methyl-1-phenyl-1H-pyrazol-5-yl)urea, CID 56642816, VU0456810

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About This Item

Empirical Formula (Hill Notation):
C17H14F2N4O
CAS Number:
1443246-62-5
Molecular Weight:
328.32
UNSPSC Code:
12352200
NACRES:
NA.77

Quality Level

100

Assay

≥98% (HPLC)

form

powder

color

white to beige

solubility

DMSO: 15 mg/mL, clear

storage temp.

−20°C

InChI

1S/C17H14F2N4O/c1-11-9-16(23(22-11)13-5-3-2-4-6-13)21-17(24)20-12-7-8-14(18)15(19)10-12/h2-10H,1H3,(H2,20,21,24)

InChI key

IEKSMUSSYJUQMY-UHFFFAOYSA-N

Biochem/physiol Actions

ML297 (VU0456810) is the first potent and selective activator of the GIRK potassium channel. The G protein-coupled inwardly-rectifying potassium channels (GIRKs 1-4) are widely distributed broadly in the central nervous system (GIRKs 1-3) and also found in the heart (GIRK-4). ML297 activates GIRK channels containing a GIRK1 subunit, and does not activate channels without a GIRK1 subunit or the closely related potassium channel Kir2.1 or voltage-gated potassium channels. ML297 has been shown to activate GIRK1/2 with a potency of ~160 nM and also to activate GIRK channels comprising of GIRK1/3 and GIRK1/4 subunit combinations. ML297 was active in two in vivo models of epilepsy, and showed equal or greater efficacy than the anti-seizure medication, sodium valproate.

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

Environment
GHS09

Signal Word

Warning

Hazard Statements

H410

Precautionary Statements

P273 - P391 - P501

Hazard Classifications

Aquatic Acute 1 - Aquatic Chronic 1

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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’.

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Jose Carlos Gonzalez et al.
Cell reports, 42(2), 112039-112039 (2023-02-08)
The central circadian regulator within the suprachiasmatic nucleus transmits time of day information by a diurnal spiking rhythm driven by molecular clock genes controlling membrane excitability. Most brain regions, including the hippocampus, harbor similar intrinsic circadian transcriptional machinery, but whether
Yulin Zhao et al.
Cell reports, 31(11), 107770-107770 (2020-06-20)
G-protein-gated inwardly rectifying K+ (GIRK) channels are essential effectors of inhibitory neurotransmission in the brain. GIRK channels have been implicated in diseases with abnormal neuronal excitability, including epilepsy and addiction. GIRK channels are tetramers composed of either the same subunit
Serap Erdogmus et al.
Nature communications, 10(1), 5784-5784 (2019-12-21)
G-protein coupled receptors (GPCRs) are versatile cellular sensors for chemical stimuli, but also serve as mechanosensors involved in various (patho)physiological settings like vascular regulation, cardiac hypertrophy and preeclampsia. However, the molecular mechanisms underlying mechanically induced GPCR activation have remained elusive.

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