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repibresib   Click here for help

GtoPdb Ligand ID: 14071

Synonyms: example 1 [US20220204500] | TAY-B1 | TAYB1
Compound class: Synthetic organic
Comment: Repibresib (included in WHO INN proposed list 133, 10th July 2025) is the INN for the bromodomain and extra-terminal motif (BET) inhibitor TAY-B1 (a.k.a. VYN201). It is a pan-BET inhibitor, that is active at BET domains of BRD2, BRD3, BRD4 and BRDT. It is engineered to act locally and limit systemic exposure.
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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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Click here for structure editor
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 Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/). 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 2
Rotatable bonds 3
Topological polar surface area 61.8
Molecular weight 332.35
XLogP 2.21
No. Lipinski's rules broken 0

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)
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.

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)

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Canonical SMILES CN1C=C(C2=C(C1=O)NC=C2)C3=C(C(=CC=C3)O)OC4=CC=CC=C4
Isomeric SMILES OC=1C(=C(C=CC1)C=2C3=C(C(N(C2)C)=O)NC=C3)OC4=CC=CC=C4
InChI InChI=1S/C20H16N2O3/c1-22-12-16(14-10-11-21-18(14)20(22)24)15-8-5-9-17(23)19(15)25-13-6-3-2-4-7-13/h2-12,21,23H,1H3
InChI Key IYQNLEOCTFTMJE-UHFFFAOYSA-N

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)
No information available.
Summary of Clinical Use Click here for help
Repibresib is being progressed to clinical trial by Vyne Therapeutics, for the topical treatmant of vitiligo.
Clinical Trials
Clinical Trial ID Title Type Source Comment References
NCT06493578 A Study to Evaluate the Efficacy, Safety, and Pharmacokinetics of VYN201 Gel in Subjects With Non-segmental Vitiligo. Phase 2 Interventional Vyne Therapeutics Inc.