chloroquine   Click here for help

GtoPdb Ligand ID: 5535

Synonyms: Aralen® | chloraquine | Malaquin®
Approved drug PDB Ligand Immunopharmacology Ligand Antimalarial Ligand
chloroquine is an approved drug (FDA (1949), UK (2000))
Compound class: Synthetic organic
Comment: Chloroquine is a 4-aminoquinoline and used primarily as an antimalarial drug.
The approved drug is a racemic mixture and we show the chemical structure without stereochemistry to represent the mixture. The non-isomeric structure is also represented in the PubChem, ChEMBL and ChEBI entries listed in the links table below, while the two enantiomers forming the racemate are represented by PubChem CID 444810 and PubChem CID 639540. The PDB entry listed in the links table is for (R)-chloroquine.
Marketed formulations may contain chloroquine phosphate (PubChem CID 64927).

The Malaria tab on this ligand page provides additional curator comments of relevance to the Guide to MALARIA PHARMACOLOGY.
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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

chloroquine 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 8
Topological polar surface area 28.16
Molecular weight 319.18
XLogP 4.27
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 CCN(CCCC(Nc1ccnc2c1ccc(c2)Cl)C)CC
Isomeric SMILES CCN(CCCC(Nc1ccnc2c1ccc(c2)Cl)C)CC
InChI InChI=1S/C18H26ClN3/c1-4-22(5-2)12-6-7-14(3)21-17-10-11-20-18-13-15(19)8-9-16(17)18/h8-11,13-14H,4-7,12H2,1-3H3,(H,20,21)
InChI Key WHTVZRBIWZFKQO-UHFFFAOYSA-N
Classification Click here for help
Compound class Synthetic organic
Ligand families/groups Antimalarial ligands
Approved drug? Yes (FDA (1949), UK (2000))
WHO Essential Medicine WHO Essential Medicines List (EML) (23rd List, 2023). Access PDF version.
Click to view more information about the WHO Model Lists of Essential Medicines.
IUPAC Name Click here for help
N'-(7-chloroquinolin-4-yl)-N,N-diethylpentane-1,4-diamine
International Nonproprietary Names Click here for help
INN number INN
386 chloroquine
Synonyms Click here for help
Aralen® | chloraquine | Malaquin®
Database Links Click here for help
Specialist databases
GPCRdb Ligand chloroquine
Reactome Drug Reactome logo R-ALL-9683477, R-ALL-9678941, R-ALL-9690591
Reactome Reaction Reactome logo R-HSA-9683467, R-HSA-9683478, R-HSA-5625574, R-HSA-597628
Other databases
BitterDB Ligand 87
CAS Registry No. 54-05-7 (source: Scifinder)
ChEBI CHEBI:3638
ChEMBL Ligand CHEMBL76
DrugBank Ligand DB00608
DrugCentral Ligand 607
GtoPdb PubChem SID 178102177
Immunopaedia Search chloroquine
PubChem CID 2719
RCSB PDB Ligand CLQ
Search Google for chemical match using the InChIKey WHTVZRBIWZFKQO-UHFFFAOYSA-N
Search Google for chemicals with the same backbone WHTVZRBIWZFKQO
Search PubMed clinical trials chloroquine
Search PubMed titles chloroquine
Search PubMed titles/abstracts chloroquine
UniChem Compound Search for chemical match using the InChIKey WHTVZRBIWZFKQO-UHFFFAOYSA-N
UniChem Connectivity Search for chemical match using the InChIKey WHTVZRBIWZFKQO-UHFFFAOYSA-N
Wikipedia Chloroquine

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Tocris
Chloroquine diphosphate (links to external site)
Cat. No. 4109