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O3636

Sigma-Aldrich

1H-[1,2,4]Oxadiazolo[4,3-a]quinoxalin-1-one

powder

Synonym(s):

ODQ

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About This Item

Empirical Formula (Hill Notation):
C9H5N3O2
CAS Number:
41443-28-1
Molecular Weight:
187.15
MDL number:
MFCD00792620
UNSPSC Code:
41106305
PubChem Substance ID:
24278054
NACRES:
NA.32

Assay

≥98% (TLC)

Quality Level

200

form

powder

color

pale yellow

solubility

ethanol: 1.2 mg/mL
DMSO: 5 mg/mL
H2O: insoluble

storage temp.

2-8°C

SMILES string

O=C1ON=C2C=Nc3ccccc3N12

InChI

1S/C9H5N3O2/c13-9-12-7-4-2-1-3-6(7)10-5-8(12)11-14-9/h1-5H

InChI key

LZMHWZHOZLVYDL-UHFFFAOYSA-N

Gene Information

human ... NOS1(4842) , NOS2(4843) , NOS2B(201288) , NOS2C(645740) , NOS3(4846)

Application

1H-[1,2,4]Oxadiazolo[4,3-a]quinoxalin-1-one has been used as a oxidising agent for  affinity selection-mass spectrometry (AS-MS) compound binding assay, as a soluble guanylate cyclase (sGC) inhibitor to inhibit S-nitroso-N-acetyl-DL-penicillamine (SNAP)-induced cGMP production.

Biochem/physiol Actions

H-[1,2,4]Oxadiazolo[4,3-a]quinoxalin-1-one (ODQ) non competitively inhibits the action of nitric oxide-sensitive guanylyl cyclase and results in a supposedly irreversible oxidation of the prosthetic heme group. ODQ has been used to study the role of cyclic guanosine monophosphate (cGMP) pathway in nitric oxide (NO) signal transduction.
Selective inhibitor of nitric oxide-sensitive guanylyl cyclase.

Caution

Hygroscopic

Storage Class Code

11 - Combustible Solids

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’.

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Characterization of 1H-[1,2,4]oxadiazolo[4,3-a]quinoxalin-1-one as a heme-site inhibitor of nitric oxide-sensitive guanylyl cyclase.
Schrammel A
Molecular Pharmacology, 50(1), 1-5 (1996)
J Garthwaite et al.
Molecular pharmacology, 48(2), 184-188 (1995-08-01)
In brain and other tissues, nitric oxide (NO) operates as a diffusible second messenger that stimulates the soluble form of the guanylyl cylase enzyme and so elicits an accumulation of cGMP in target cells. Inhibitors of NO synthesis have been
Serena Materazzi et al.
Microvascular research, 109, 38-44 (2016-11-08)
The role of endogenous H2S has been highlighted as a gaseous transmitter. The vascular smooth muscle inhibitory effects of H2S have been characterized in isolated aorta and mesenteric arteries in rats and mice. Our study was aimed at investigating the
Diana Braun et al.
Frontiers in physiology, 9, 480-480 (2018-05-19)
Ischemia/reperfusion injury holds a key position in many pathological conditions such as acute kidney injury and in the transition to chronic stages of renal damage. We hypothesized that besides a reported disproportional activation of vasoconstrictor response, hypoxia/reoxygenation (H/R) adversely affects
Lineu Baldissera et al.
Pulmonary pharmacology & therapeutics, 41, 86-95 (2016-11-07)
Activators of soluble guanylyl cyclase (sGC) act preferentially in conditions of enzyme oxidation or haem group removal. This study was designed to investigate the effects of the sGC activator BAY 60-2770 in murine airways inflammation and human eosinophil chemotaxis. C57Bl/6
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