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Chemical Component Summary

NameTRIMETHOPRIM
Identifiers5-[(3,4,5-trimethoxyphenyl)methyl]pyrimidine-2,4-diamine
FormulaC14 H18 N4 O3
Molecular Weight290.32 g/mol
TypeNON-POLYMER
Isomeric SMILESCOc1cc(Cc2cnc(N)nc2N)cc(OC)c1OC
InChIInChI=1S/C14H18N4O3/c1-19-10-5-8(6-11(20-2)12(10)21-3)4-9-7-17-14(16)18-13(9)15/h5-7H,4H2,1-3H3,(H4,15,16,17,18)
InChIKeyIEDVJHCEMCRBQM-UHFFFAOYSA-N

Chemical Details

Formal Charge0
Atom Count39
Chiral Atom Count0
Chiral Atomsn/a
Bond Count40
Aromatic Bond Count12
Leaving Atomsn/a

Drug Info: DrugBank

DrugBank IDDB00440 Stereoisomeric match
NameTrimethoprim
Groups
  • approved
  • vet_approved
DescriptionA pyrimidine inhibitor of dihydrofolate reductase, it is an antibacterial related to pyrimethamine. The interference with folic acid metabolism may cause a depression of hematopoiesis. It is potentiated by sulfonamides and the trimethoprim-sulfamethoxazole combination is the form most often used. It is sometimes used alone as an antimalarial. Trimethoprim resistance has been reported. [PubChem]
Synonyms
  • 2,4-Diamino-5-(3,4,5-trimethoxybenzyl)pyrimidine
  • 5-[(3,4,5-Trimethoxyphenyl)methyl]-2,4-pyrimidinediamine
  • Proloprim
  • Trimethoprim
  • Triméthoprime
Salts
  • Trimethoprim hydrochloride
  • Trimethoprim sulfate
Brand Names
  • Apo Sulfatrim DS Tab
  • Apo Sulfatrim Pediatric
  • Apo Sulfatrim Tab
  • Apo-sulfatrim Oral Suspension
  • Bactrim
Affected Organism
  • Gram negative and gram positive bacteria
  • Listeria monocytogenes
  • Escherichia coli
IndicationFor the treatment of urinary tract infections, uncomplicated pyelonephritis (with sulfamethoxazole) and mild acute prostatitis. May be used as pericoital (with sulfamethoxazole) or continuous prophylaxis in females with recurrent cystitis. May be used as an alternative to treat asymptomatic bacteriuria during pregnancy (only before the last 6 weeks of pregnancy). Other uses include: alternative agent in respiratory tract infections (otitis, sinusitus, bronchitis and pneumonia), treatment of Pneumocystis jirovecii pneumonia (acute or prophylaxis), Nocardia infections, and traveller's diarrhea.
PharmacologyTrimethoprim is a pyrimidine analogue that disrupts folate synthesis, an essential part of the thymidine synthesis pathway. Inhibition of the enzyme starves the bacteria of nucleotides necessary for DNA replication.The drug, therefore, exhibits bactericidal activity.
Mechanism of actionTrimethoprim binds to dihydrofolate reductase and inhibits the reduction of dihydrofolic acid (DHF) to tetrahydrofolic acid (THF). THF is an essential precursor in the thymidine synthesis pathway and interference with this pathway inhibits bacterial DNA synthesis. Trimethoprim's affinity for bacterial dihydrofolate reductase is several thousand times greater than its affinity for human dihydrofolate reductase. Sulfamethoxazole inhibits dihydrofolate synthetase (aka dihydropteroate synthetase), an enzyme involved further upstream in the same pathway. Trimethoprim and sulfamethoxazole are commonly used in combination due to their synergistic effects. This drug combination also reduces the development of resistance that is seen when either drug is used alone.
Route of administration
  • Intravenous
  • Ophthalmic
  • Oral
Categories
  • Anti-Infective Agents
  • Anti-Infective Agents, Urinary
  • Antibacterials for Systemic Use
  • Antiinfectives for Systemic Use
  • Antimalarials
ATC-Code
  • J01EE01
  • J01EE07
  • J01EE05
  • J01EA01
  • J01EE04
AHFS-Code08:36.00
CAS number738-70-5
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