avoralstat   Click here for help

GtoPdb Ligand ID: 11584

Synonyms: BCX-4161 | BCX4161
PDB Ligand
Compound class: Synthetic organic
Comment: Avoralstat (BCX-4161) is a small molecule, oral plasma kallikrein (a serine protease that generates bradykinin from kininogen) inhibitor [3]. Data pubished in 2021 indicate that avoralstat inhibits TMPRSS2 (a protease required for spike protein-mediated SARS-CoV-2 viral entry via ACE2) with comparable inhibitory activity to camostat [2].
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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 9
Hydrogen bond donors 5
Rotatable bonds 12
Topological polar surface area 167.49
Molecular weight 513.2
XLogP 1.7
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(c(cc1C=C)C(=O)Nc1ccc(cc1)C(=N)N)c1ccc(nc1C(=O)O)C(=O)NCC1CC1
Isomeric SMILES COc1cc(c(cc1C=C)C(=O)Nc1ccc(cc1)C(=N)N)c1ccc(nc1C(=O)O)C(=O)NCC1CC1
InChI InChI=1S/C28H27N5O5/c1-3-16-12-21(26(34)32-18-8-6-17(7-9-18)25(29)30)20(13-23(16)38-2)19-10-11-22(33-24(19)28(36)37)27(35)31-14-15-4-5-15/h3,6-13,15H,1,4-5,14H2,2H3,(H3,29,30)(H,31,35)(H,32,34)(H,36,37)
InChI Key TUWMKPVJGGWGNL-UHFFFAOYSA-N
No information available.
Summary of Clinical Use Click here for help
BCX-4161 is/was a clinical candidate for the treatment of hereditary angioedema (HAE) [1].
Clinical Trials
Clinical Trial ID Title Type Source Comment References
NCT02125162 A Study of the Relative Bioavailability of a New Formulation of BCX4161 and the Effect of Food on BCX4161 Phase 1 Interventional BioCryst Pharmaceuticals
NCT02670720 Open-label, Long-term Safety Study of Avoralstat in Subjects With Hereditary Angioedema Phase 3 Interventional BioCryst Pharmaceuticals This study was terminated as data from a previous efficacy study did not support continued development.
NCT02303626 12-Week Safety and Efficacy Study of BCX4161 as an Oral Prophylaxis Against HAE Attacks Phase 2/Phase 3 Interventional BioCryst Pharmaceuticals This study did not demonstrate efficacy of avoralstat as HAE prophylaxis. 4