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N171

Sigma-Aldrich

NBQX hydrate

powder, ≥98% (HPLC)

Synonym(s):

1,2,3,4-Tetrahydro-6-nitro-2,3-dioxo-benzo[f]quinoxaline-7-sulfonamide hydrate, FG 9202

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About This Item

Empirical Formula (Hill Notation):
C12H8N4O6S · xH2O
CAS Number:
118876-58-7
Molecular Weight:
336.28 (anhydrous basis)
MDL number:
MFCD11046016
UNSPSC Code:
12352200
PubChem Substance ID:
329818588
NACRES:
NA.77

Quality Level

100

Assay

≥98% (HPLC)

form

powder

color

yellow

solubility

methanol: 0.25 mg/mL
45% (w/v) aq 2-hydroxypropyl-β-cyclodextrin: 0.5 mg/mL
DMSO: 4 mg/mL
H2O: insoluble

SMILES string

O.NS(=O)(=O)c1cccc2c3NC(=O)C(=O)Nc3cc([N+]([O-])=O)c12

InChI

1S/C12H8N4O6S.H2O/c13-23(21,22)8-3-1-2-5-9(8)7(16(19)20)4-6-10(5)15-12(18)11(17)14-6;/h1-4H,(H,14,17)(H,15,18)(H2,13,21,22);1H2

InChI key

VOYWRRFTJLCIEL-UHFFFAOYSA-N

General description

NBQX [2,3-dihydroxy-6-nitro-7-sulphamoyl-benzo(F)quinoxaline] is a competitive antagonist, which shows high affinity to 2-amino-3-hydroxy-5-methyl-4-isoxazol propionic acid (AMPA) receptor than kainite receptor.

Application

NBQX hydrate has been used:
  • as a non-N-methyl-D-aspartate receptor (NMDA) 2-amino-3-hydroxy-5-methyl-4-isoxazol propionic acid (AMPA) receptor antagonist to monitor gonadotropin responses
  • α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor (AMPAR) antagonist in monocytes
  • AMPA and N-methyl-D-aspartate receptor (NMDA) antagonist in migrating interneurons expressing potassium-chloride cotransporter (shKCC2)

Biochem/physiol Actions

NBQX [2,3-dihydroxy-6-nitro-7-sulphamoyl-benzo(F)quinoxaline], an anticonvulsant provides protection against white matter damage in spinal cord crush injury and also protects oligodendrocyte in experimental autoimmune encephalomyelitis (EAE). However, its role in preventing inflammation in EAE is not yet clear.
Neuroprotective AMPA/kainate glutamate receptor antagonist.

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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Jane E Libbey et al.
Experimental neurology, 280, 89-96 (2016-04-14)
Seizures occur due to an imbalance between excitation and inhibition, with the balance tipping towards excitation, and glutamate is the predominant excitatory neurotransmitter in the central nervous system of mammals. Since upregulation of expression and/or function of glutamate receptors can
Pro-inflammatory monocyte profile in patients with major depressive disorder and suicide behaviour and how ketamine induces anti-inflammatory M2 macrophages by NMDAR and mTOR
Nowak W, et al.
EBioMedicine, 50, 290-305 (2019)
Glutamate excitotoxicity in a model of multiple sclerosis
Pitt D, et al.
Nature Medicine, 6(1), 67-70 (2000)
D Pitt et al.
Nature medicine, 6(1), 67-70 (1999-12-29)
Glutamate excitotoxicity mediated by the AMPA/kainate type of glutamate receptors damages not only neurons but also the myelin-producing cell of the central nervous system, the oligodendrocyte. In multiple sclerosis, myelin, oligodendrocytes and some axons are lost as a result of
NBQX, a highly selective competitive antagonist of AMPA and KA ionotropic glutamate receptors, increases seizures and mortality following picornavirus infection
Libbey JE, et al.
Experimental Neurology, 280, 89-96 (2016)
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