primaquine   Click here for help

GtoPdb Ligand ID: 9952

Approved drug PDB Ligand Antimalarial Ligand
primaquine is an approved drug (FDA (1952))
Compound class: Synthetic organic
Comment: Primaquine is a synthetic, 8-aminoquinoline derivative that has potent antimalarial activity.
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 3044368 and PubChem CID 3044369.
The marketed formulations contain primaquine phosphate (PubChem CID 6135).

The Malaria tab on this ligand page provides additional curator comments of relevance to the Guide to MALARIA PHARMACOLOGY.
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 3
Hydrogen bond donors 2
Rotatable bonds 6
Topological polar surface area 60.17
Molecular weight 259.17
XLogP 2.09
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 NCCCC(Nc1cc(OC)cc2c1nccc2)C
Isomeric SMILES NCCCC(Nc1cc(OC)cc2c1nccc2)C
InChI InChI=1S/C15H21N3O/c1-11(5-3-7-16)18-14-10-13(19-2)9-12-6-4-8-17-15(12)14/h4,6,8-11,18H,3,5,7,16H2,1-2H3
InChI Key INDBQLZJXZLFIT-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
Primaquine has a broad spectrum of antimalarial activity and has a number of uses: primary prophylaxis against all Plasmodium species, terminal prophylaxis for P. vivax and P. ovale exposure, and as a radical cure (in combination with an effective blood stage schizonticide) after P. vivax or P. ovale clinical disease [2]. In addition, a recent WHO policy update, recommends the use of primaquine as a gametocytocide to reduce P. falciparum malaria transmission from human to mosquito host.
Testing for glucose-6-phosphate dehydrogenase (G6PD) deficiency is required before administration because primaquine causes haemolysis in genetically sensitive individuals [3].
Pharmacokinetics Click here for help
Elimination
Primaquine has a terminal half-life for elimination in the 2-12 hour range [2].
External links Click here for help
For extended ADME data see the following:

Drugs.com