aspirin   Click here for help

GtoPdb Ligand ID: 4139

Synonyms: Acetophen® | acetylsalicylic acid | Aspirin®
Approved drug PDB Ligand Immunopharmacology Ligand
aspirin is an approved drug (FDA (no history prior to 1965))
Compound class: Synthetic organic
Comment: Aspirin is the prototypical cyclooxygenase inhibitor and inhibits the biosynthesis of prostaglandins. Aspirin acid also inhibits platelet aggregation and is used in the prevention of arterial and venous thrombosis.
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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

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View more information in the IUPHAR Pharmacology Education Project: aspirin

aspirin is commercially available from our sponsors

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 3
Hydrogen bond donors 1
Rotatable bonds 3
Topological polar surface area 63.6
Molecular weight 180.04
XLogP 1.42
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 CC(=O)Oc1ccccc1C(=O)O
Isomeric SMILES CC(=O)Oc1ccccc1C(=O)O
InChI InChI=1S/C9H8O4/c1-6(10)13-8-5-3-2-4-7(8)9(11)12/h2-5H,1H3,(H,11,12)
InChI Key BSYNRYMUTXBXSQ-UHFFFAOYSA-N
No information available.
Summary of Clinical Use Click here for help
Aspirin is used to treat pain, and reduce fever or inflammation. It is also used as a preventative treatment for heart attacks, strokes, and chest pain (angina).
Mechanism Of Action and Pharmacodynamic Effects Click here for help
The analgesic, antipyretic, and anti-inflammatory effects of aspirin are due to direct and irreversible inhibition of both cyclooxygenases (COX-1 and COX-2) leading to decreased formation of the precursors of prostaglandins and thromboxanes from arachidonic acid. The main mechanism accounting for platelet aggregation-inhibition by aspirin is irreversible acetylation and inactivation of platelet cyclooxygenase, which blocks the formation of the aggregating agent thromboxane A2.