darigabat   Click here for help

GtoPdb Ligand ID: 9798

Synonyms: example 4 [WO2014091368] | PF-06372865 | PF06372865
Compound class: Synthetic organic
Comment: Darigabat (PF-06372865) is an orally active, GABAA receptor positive allosteric modulator, that selectively targets GABAA receptors containing α2/3/5 subunits over receptors containing α1 subunits [1,3]. The α1 subunit is associated with the (undesirable) sedative effects of benzodiazepine drugs, whilst the α2/3 subunits contribute to their anxiolytic and analgesic activities and the α5 subunit to effects on memory function. The chemical structure of this compound is claimed as 'Example 4' in patent WO2014091368 [2]. Pfizer are developing PF-06372865 for clinical potential in the treatment of chronic pain [4] and photosensitive epilepsy, but have terminated development in generalized anxiety disorder.
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Ligand Activity Visualisation Charts

These are box plot that provide a unique visualisation, summarising all the activity data for a ligand taken from ChEMBL and GtoPdb across multiple targets and species. Click on a plot to see the median, interquartile range, low and high data points. A value of zero indicates that no data are available. A separate chart is created for each target, and where possible the algorithm tries to merge ChEMBL and GtoPdb targets by matching them on name and UniProt accession, for each available species. However, please note that inconsistency in naming of targets may lead to data for the same target being reported across multiple charts.

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View interactive charts of activity data across species
2D Structure
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2D Structure

An image of the ligand's 2D structure. For small molecules with SMILES these are drawn using the NCI/CADD Chemical Identifier Resolver. Click on the image to access the chemical structure search tool with the ligand pre-loaded in the structure editor. For other types of ligands, e.g. longer nucleotides and peptides, a manually drawn representation of the molecule may be provided.

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Physico-chemical Properties
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Physico-chemical Properties

Calculated molecular properties are available for small molecules and natural products (not peptides). Properties were generated using the CDK toolkit. All properties were selected to enable the prediction of the Lipinski Rule-of-Five profile or ‘druglikeness’ for each ligand. For more info on each category see the help pages.

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Hydrogen bond acceptors 5
Hydrogen bond donors 0
Rotatable bonds 6
Topological polar surface area 95.35
Molecular weight 440.13
XLogP 4.53
No. Lipinski's rules broken 0
SMILES / InChI / InChIKey
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SMILES / InChI / InChIKey

SMILES (Simplified Molecular Input Line Entry Specification) A specification for unambiguously describing the structure of chemical molecules using short ASCII strings. Canonical SMILES specify a unique representation of the 2D structure without chiral or isotopic specifications. Isomeric SMILES include chiral specification and isotopes.

Standard InChI (IUPAC International Chemical Identifier) and InChIKey InChI is a non-proprietary, standard, textual identifier for chemical substances designed to facilitate linking of information and database searching. An InChIKey is a simplified version of a full InChI, designed for easier web searching.

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Canonical SMILES COc1cc(ccc1c1cc(ccc1F)c1cnnc2c1ncn2CC)S(=O)(=O)CC
Isomeric SMILES COc1cc(ccc1c1cc(ccc1F)c1cnnc2c1ncn2CC)S(=O)(=O)CC
InChI InChI=1S/C22H21FN4O3S/c1-4-27-13-24-21-18(12-25-26-22(21)27)14-6-9-19(23)17(10-14)16-8-7-15(11-20(16)30-3)31(28,29)5-2/h6-13H,4-5H2,1-3H3
InChI Key PTTQXDBPTFOCMT-UHFFFAOYSA-N
References
1. Nickolls SA, Gurrell R, van Amerongen G, Kammonen J, Cao L, Brown AR, Stead C, Mead A, Watson C, Hsu C et al.. (2018)
Pharmacology in translation: the preclinical and early clinical profile of the novel α2/3 functionally selective GABAA receptor positive allosteric modulator PF-06372865.
Br J Pharmacol, 175 (4): 708-725. [PMID:29214652]
2. Omoto K, Owen RM, Pryde DC, Watson CAL, Takeuchi M. (2014)
Imidazopyridazine derivatives as GABAA receptor modulators.
Patent number: WO2014091368. Assignee: Pfizer Limited. Priority date: 14/12/2012. Publication date: 19/06/2014.
3. Owen RM, Blakemore D, Cao L, Flanagan N, Fish R, Gibson KR, Gurrell R, Huh CW, Kammonen J, Mortimer-Cassen E et al.. (2019)
Design and Identification of a Novel, Functionally Subtype Selective GABAA Positive Allosteric Modulator (PF-06372865).
J Med Chem, 62 (12): 5773-5796. [PMID:30964988]
4. van Amerongen G, Siebenga PS, Gurrell R, Dua P, Whitlock M, Gorman D, Okkerse P, Hay JL, Butt RP, Groeneveld GJ. (2019)
Analgesic potential of PF-06372865, an α2/α3/α5 subtype-selective GABAA partial agonist, in humans.
Br J Anaesth, 123 (2): e194-e203. [PMID:30915991]