Chemical Component Summary

FormulaC42 H59 N3 O10
Molecular Weight765.93
Isomeric SMILESCC[C@H]1OC(=O)[C@H](C)C(=O)[C@H](C)[C@@H](O[C@@H]2O[C@H](C)C[C@@H]([C@H]2O)N(C)C)[C@@](C)(C[C@@H](C)C(=O)[C@H](C)[C@H]2NC(=O)O[C@]12C)OC\C=C\c1cnc2ccccc2c1

Chemical Details

Formal Charge0
Atom Count114
Chiral Atom Count13
Chiral AtomsC10, C12, C16, C19, C2, C22, C23, C25, C26, C5, C7, C8, C9
Bond Count118
Aromatic Bond Count11
Leaving Atomsn/a

Drug Info: DrugBank

DrugBank IDDB06419 Different stereochemistry
DescriptionCethromycin, trade name Restanza (initially known as ABT-773) is a ketolide antibiotic undergoing research for the treatment of community acquired pneumonia (CAP) and for the prevention of post-exposure inhalational anthrax, and was given an "orphan drug" status for this indication. Originally discovered and developed by Abbott, it was acquired by Advanced Life Sciences Inc. for further development. In June 2009,an FDA Anti-Infective Drugs Advisory Committee review found insufficient evidence for cethromycin efficacy in treatment of community acquired pneumonia, as the Phase 3 clinical trial followed standards that were updated after the clinical trial but three months prior to review. The committee did, however, find the drug safe to use.
Brand NamesRestanza
Affected OrganismBacteria
IndicationInvestigated for use/treatment in bacterial infection, pediatric indications, and pneumonia.
Mechanism of actionCethromycin is a ketolide antibiotic derived from erythromycin A with a 14 membered macrolide group. Its greater potency than macrolide antibiotics such as erythromycin, clrithromycin and azithromycin may be due to increased ribosomal binding affinity, increasing accumulation and decreasing efflux. Ketolide antibiotics lack the 3-O-cladinose (replaced by a keto group), a 11,12- or 6,11-cyclic moiety and a heteroaryl-alkyl side chain attached to the macrocyclic ring contained in macrolide antibiotics. They bind at two distinct binding sites in the 23S rRNA.
  • Anti-Bacterial Agents
  • Anti-Infective Agents
  • Chemical Actions and Uses
  • Erythromycin
  • Lactones
CAS number205110-48-1

Drug Targets

NameSequence SearchPharmacological ActionActions
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