CP6 as a free ligand exists in 11 entries. Examples include: 3UM5 1J3J 2BLA

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View summary at Ligand Expo

Chemical Component Summary

FormulaC12 H13 Cl N4
Molecular Weight248.71
Isomeric SMILESCCc1nc(N)nc(N)c1-c1ccc(Cl)cc1

Chemical Details

Formal Charge0
Atom Count30
Chiral Atom Count0
Chiral Atomsn/a
Bond Count31
Aromatic Bond Count13
Leaving Atomsn/a

Drug Info: DrugBank

DrugBank IDDB00205 Different stereochemistry
  • approved
  • vet_approved
DescriptionOne of the folic acid antagonists that is used as an antimalarial or with a sulfonamide to treat toxoplasmosis. [PubChem]
  • 2,4-Diamino-5-(4-chlorophenyl)-6-ethylpyrimidine
  • 2,4-Diamino-5-(P-chlorophenyl)-6-ethylpyrimidine
  • 2,4-Diamino-5-chlorophenyl-6-ethylpyrimidine
  • 5-(4-Chlorophenyl)-6-ethyl-2,4-diaminopyrimidine
  • 5-(4-Chlorophenyl)-6-ethyl-2,4-pyrimidinediamine
SaltsPyrimethamine Hydrochloride
Brand Names
  • Daraprim
  • Fansidar Tablets
  • Pyrimethamine Leucovorin
Affected OrganismPlasmodium
IndicationFor the treatment of toxoplasmosis and acute malaria; For the prevention of malaria in areas non-resistant to pyrimethamine
PharmacologyPyrimethamine is an antiparasitic compound commonly used as an adjunct in the treatment of uncomplicated, chloroquine resistant, P. falciparum malaria. Pyrimethamine is a folic acid antagonist and the rationale for its therapeutic action is based on the differential requirement between host and parasite for nucleic acid precursors involved in growth. This activity is highly selective against plasmodia and Toxoplasma gondii. Pyrimethamine possesses blood schizonticidal and some tissue schizonticidal activity against malaria parasites of humans. However, the 4-amino-quinoline compounds are more effective against the erythrocytic schizonts. It does not destroy gametocytes, but arrests sporogony in the mosquito. The action of pyrimethamine against Toxoplasma gondii is greatly enhanced when used in conjunction with sulfonamides.
Mechanism of actionPyrimethamine inhibits the dihydrofolate reductase of plasmodia and thereby blocks the biosynthesis of purines and pyrimidines, which are essential for DNA synthesis and cell multiplication. This leads to failure of nuclear division at the time of schizont formation in erythrocytes and liver.
Route of administrationOral
  • Anti-Infective Agents
  • Antimalarials
  • Antiparasitic Agents
  • Antiparasitic Products, Insecticides and Repellents
  • Antiprotozoals
  • P01BF04
  • P01BD01
  • P01BD51
CAS number58-14-0
Drug Info/Drug Targets: DrugBank 3.0: a comprehensive resource for 'omics' research on drugs. Knox C, Law V, Jewison T, Liu P, Ly S, Frolkis A, Pon A, Banco K, Mak C, Neveu V, Djoumbou Y, Eisner R, Guo AC, Wishart DS. Nucleic Acids Res. 2011 Jan; 39 (Database issue):D1035-41. | PMID:21059682