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ethionamide   Click here for help

GtoPdb Ligand ID: 12954

Synonyms: 1314 TH | Bayer 5312 | Trecator®
Approved drug PDB Ligand
ethionamide is an approved drug (FDA (1965))
Compound class: Synthetic organic
Comment: Ethionamide is a thioamide compound with potent antibacterial activity against mycobacteria. It is used in the treatment of multidrug-resistant tuberculosis (MDR-TB) and extensively drug-resistant tuberculosis (XDR-TB). Ethionamide inhibits mycobacterial fatty acid synthesis by targeting InhA (an enoyl-acyl carrier protein reductase) [2], following intracellular activation, by the monooxygenase EthA, in Mycobacterium tuberculosis [1].

ethionamide 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 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 2
Hydrogen bond donors 1
Rotatable bonds 2
Topological polar surface area 70.47
Molecular weight 166.24
XLogP -0.23
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 CCC1=CC(=CC=N1)C(=S)N
Isomeric SMILES CCC1=NC=CC(=C1)C(=S)N
InChI InChI=1S/C8H10N2S/c1-2-7-5-6(8(9)11)3-4-10-7/h3-5H,2H2,1H3,(H2,9,11)
InChI Key AEOCXXJPGCBFJA-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/)
Bioactivity Comments
The MIC for in vitro antimycobacterial activity is 0.25 μg/ml against Mycobacterium tuberculosis H37Rv and 0.25-4.0 μg/ml against a panel of drug-sensitive and drug-resistant M. tuberculosis isolates [3].