L-655,708

Modify Date: 2025-09-18 07:05:09

L-655,708 Structure
L-655,708 structure
Common Name L-655,708
CAS Number 130477-52-0 Molecular Weight 341.36100
Density 1.42g/cm3 Boiling Point 584.4ºC at 760mmHg
Molecular Formula C18H19N3O4 Melting Point N/A
MSDS Chinese USA Flash Point 307.2ºC

 Use of L-655,708


L-655708 is a potent α5 subunit-selective GABAA receptor inverse agonist (Ki = 0.45 nM).IC50: 0.45 nM (Ki)Target: GABAin vitro: L-655708 is a potent, selective inverse agonist for the benzodiazepine site of GABAA receptors containing the α5 subunit (Ki = 0.45 nM). Displays 50-100-fold selectivity over GABAA receptors containing α1, α2, α3 orα6 subunits in combination with β3 and γ2. Enhances LTP in a mouse hippocampal slice model and increases spatial learning, without displaying proconvulsant activity.in vivo: L-655708 at 0.7 mg/kg, administered intraperitoneally, would result in 60-70% occupancy of α5 GABAA receptors with limited binding to α1, α2, and α3 subunit-containing GABAA receptors and no significant off-target behavioral effects, such as sedation and motor impairment.[1]

 Names

Name L-655,708,11,12,13,13a-Tetrahydro-7-methoxy-9-oxo-9H-imidazo[1,5-a]pyrrolo[2,1-c][1,4]benzodiazepine-1-carboxylicacid,ethylester
Synonym More Synonyms

 L-655,708 Biological Activity

Description L-655708 is a potent α5 subunit-selective GABAA receptor inverse agonist (Ki = 0.45 nM).IC50: 0.45 nM (Ki)Target: GABAin vitro: L-655708 is a potent, selective inverse agonist for the benzodiazepine site of GABAA receptors containing the α5 subunit (Ki = 0.45 nM). Displays 50-100-fold selectivity over GABAA receptors containing α1, α2, α3 orα6 subunits in combination with β3 and γ2. Enhances LTP in a mouse hippocampal slice model and increases spatial learning, without displaying proconvulsant activity.in vivo: L-655708 at 0.7 mg/kg, administered intraperitoneally, would result in 60-70% occupancy of α5 GABAA receptors with limited binding to α1, α2, and α3 subunit-containing GABAA receptors and no significant off-target behavioral effects, such as sedation and motor impairment.[1]
Related Catalog
References

[1]. Saab BJ, et al. Short-term memory impairment after isoflurane in mice is prevented by the α5 γ-aminobutyric acid type A receptorinverse agonist L-655708. Anesthesiology. 2010 Nov;113(5):1061-1071.

 Chemical & Physical Properties

Density 1.42g/cm3
Boiling Point 584.4ºC at 760mmHg
Molecular Formula C18H19N3O4
Molecular Weight 341.36100
Flash Point 307.2ºC
Exact Mass 341.13800
PSA 73.66000
LogP 2.28620
Vapour Pressure 1.21E-13mmHg at 25°C
Index of Refraction 1.675
InChIKey YKYOQIXTECBVBB-AWEZNQCLSA-N
SMILES CCOC(=O)c1ncn2c1C1CCCN1C(=O)c1cc(OC)ccc1-2
Storage condition 2-8℃

 Safety Information

Personal Protective Equipment Eyeshields;Gloves;type N95 (US);type P1 (EN143) respirator filter
RIDADR NONH for all modes of transport

 Articles4

More Articles
Rat and human hippocampal alpha5 subunit-containing gamma-aminobutyric AcidA receptors have alpha5 beta3 gamma2 pharmacological characteristics.

Mol. Pharmacol. 54 , 928-933, (1998)

The gamma-aminobutyric acid (GABA)A receptor is a hetero-oligomer consisting of five subunits, the combination of which confers unique pharmacological properties to the receptor. To understand the phy...

Autoradiographic localization of alpha5 subunit-containing GABAA receptors in rat brain.

Brain Res. 822 , 265-270

Multiple subtypes of GABAA receptors are expressed in the rat central nervous system (CNS). To determine the distribution and proportion of alpha5 subunit containing receptors, quantitative autoradiog...

Rapid Antidepressant Action and Restoration of Excitatory Synaptic Strength After Chronic Stress by Negative Modulators of Alpha5-Containing GABAA Receptors.

Neuropsychopharmacology 40 , 2499-509, (2015)

Selective serotonin reuptake inhibitors (SSRIs) are the primary pharmacological treatment for depression, but SSRIs are effective in only half of the patients and typically take several weeks to relie...

 L-655,708Bioassay

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Name: Metabolic stability in human liver microsomes assessed as compound remaining at 10 uM...
Source: ChEMBL
Target: Liver
External Id: CHEMBL3993036
Name: Primary qHTS for small molecule stabilizers of the endoplasmic reticulum resident pro...
Source: NCGC
Target: N/A
External Id: SERCaMPGLuc-p1-antagonist
Name: Inhibition of neurosphere proliferation of mouse neural precursor cells by MTT assay
Source: ChEMBL
Target: N/A
External Id: CHEMBL1266185
Name: Primary qHTS assay for inhibitors of alpha-synuclein gene (SNCA) expression
Source: NCGC
External Id: SNCA-p-activity-luciferase
Name: Metabolic stability in mouse liver microsomes assessed as compound remaining at 10 uM...
Source: ChEMBL
Target: Liver
External Id: CHEMBL3993037
Name: qHTS Validation Assay for Inhibitors of Ubiquitin-specific Protease USP2a Using CHOP2...
Source: NCGC
Target: ubiquitin carboxyl-terminal hydrolase 2 isoform a [Homo sapiens]
External Id: UBCH001
Name: Cytotoxicity in human BEAS2B cells after 48 hrs by Cell-titer Glo reagent based assay
Source: ChEMBL
Target: BEAS-2B
External Id: CHEMBL3993043
Name: Rescue cell viability in cybrid cells with a genetic mutation in complex 1 of the mit...
Source: ICCB-Longwood/NSRB Screening Facility, Harvard Medical School
Target: N/A
External Id: HMS1315
Name: Half life in mouse liver microsomes at 10 uM by LC-MS/MS analysis
Source: ChEMBL
Target: Liver
External Id: CHEMBL3993039
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 Synonyms

l-655,708
L-655708
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