≥98% (HPLC)

1-(4-methoxybenzyl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid, Benzyl quinolone carboxylic acid
Empirical Formula (Hill Notation):
Número de CAS:
Peso molecular:
MDL number:
PubChem Substance ID:
En este momento no podemos mostrarle ni los precios ni la disponibilidad

Quality Level


≥98% (HPLC)




white to beige


DMSO: 10 mg/mL (clear solution)

storage temp.


SMILES string




InChI key



10, 50 mg in glass bottle

Biochem/physiol Actions

BQCA is a potent muscarinic M1 receptor positive allosteric modulator with selectivity for M1 over M2-M5. It potentiates M1 activity in in vitro and in vivo assays and is orally bioavailable. Muscarinic 1 (M1) receptors are expressed in brain regions responsible for attention and memory, including hippocampus, cortex, and striatum. BQCA binds allosterically to M1 to enhance the binding and efficacy of ACh at the receptor. M1 activation is a proposed mechanism for increasing information processing in disease states, such as Alzheimer′s. M1 agonists are being studied as potential therapeutic agents to treat Alzheimer′s disease and the cognitive and negative symptoms of schizophrenia. BQCA has been shown to improve performance in cognition tasks and increase cerebral blood flow.

Features and Benefits

This compound is featured on the Acetylcholine Receptors (Muscarinic) page of the Handbook of Receptor Classification and Signal Transduction. To browse other handbook pages, click here.
This compound is a featured product for Neuroscience research. Click here to discover more featured Neuroscience products. Learn more about bioactive small molecules for other areas of research at


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Hazard Codes


Risk Statement



NONH for all modes of transport

WGK Germany


Flash Point F

Not applicable

Flash Point C

Not applicable

Tao Le et al.
Food chemistry, 175, 85-91 (2015-01-13)
An indirect competitive enzyme-linked immunosorbent assay (ic-ELISA) and time-resolved fluoroimmunoassay (TR-FIA) based on an anti-N-butylquinoxaline-2-carboxamide (BQCA) monoclonal antibody were standardized and validated for quinoxaline-2-carboxylic acid (QCA) screening in animal tissues and its performance were compared to HPLC. The sensitivities obtained...
Kwok H C Choy et al.
The Journal of pharmacology and experimental therapeutics, 359(2), 354-365 (2016-09-16)
Current antipsychotics are effective in treating the positive symptoms associated with schizophrenia, but they remain suboptimal in targeting cognitive dysfunction. Recent studies have suggested that positive allosteric modulation of the M1 muscarinic acetylcholine receptor (mAChR) may provide a novel means...
Emi Kurimoto et al.
The Journal of pharmacology and experimental therapeutics, 364(1), 28-37 (2017-10-14)
Activation of muscarinic M
Sara Bdioui et al.
Journal of receptor and signal transduction research, 39(2), 106-113 (2019-07-20)
Context: Drugs such as positive allosteric modulators (PAMs) produce complex behaviors when acting on tissues in different physiological contexts in vivo. Objective: This study describes the use of functional assays of varying receptor sensitivity to unveil the various behaviors of...
Regina Messerer et al.
ACS chemical biology, 12(3), 833-843 (2017-01-25)
Aiming to design partial agonists as well as allosteric modulators for the M
Muscarinic acetylcholine receptors are G protein-coupled receptors (GPCRs) and mediate acetylcholine actions in the CNS and non-nervous tissues. Learn more about acetylcholine receptors and their role in cell signaling.
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