873857-62-6 Basic information More..
Product Name:FidaxoMicin
Synonyms:Dificid;FidaxoMicin;3-(((6-Deoxy-4-O-(3,5-dichloro-2-ethyl-4,6-dihydroxybenzoyl)-2-O-methyl-b-D-mannopyranosyl)oxy)-methyl)-12(R)-[(6-deoxy-5-C-methyl-4-O-(2-methyl-1-oxopropyl)-b-D-lyxo-hexopyranosyl)oxy]-11(S)-ethyl-8(S)-hydroxy-18(S)-(1(R)-hydroxyethyl)-9,13,15-trimethyloxacyclooctadeca-3,5,9,13,15-pentaene-2-one;OPT-80;PAR-101;R-Tiacumicin B;FidaxoMicin(LipiarMycin);ClostoMicin B1, LipiarMycin A3, TiacuMicin B, OPT 80
Mol File:873857-62-6.mol


Fidaxomicin (OPT-80) was approved by the U.S. FDA in May 2011 for the treatment of Clostridium difficile-associated diarrhea (CDAD), joining metronidazole and vancomycin as drugs recommended for treatment of C. difficile infections (CDI). Fidaxomicin, also known as lipiarmycin and tiacumicin, is an 18-membered macrolide natural product that was first reported in mid-1970s and is produced by fermentation. Fidaxomicin and its primary metabolite OP-1118, which results from hydrolysis of the isobutyryl ester, are narrowspectrum antibacterial agents with activity against gram-positive aerobic and anaerobic organisms, but not against gram-negative organisms. Fidaxomicin and OP-1118 exert their antibacterial activity by inhibiting bacterial RNA polymerase, thereby inhibiting bacterial protein synthesis. The MIC90 (minimum inhibitory concentration to kill 90% of bacteria) for fidaxomicin against C.difficile is 0.125–0.25 μg/mL; OP- 1118 is 4- to 16-fold less potent than the parent compound. Fidaxomicin has been reported to spare native intestinal flora such as Bacteroides spp. and as such, may prevent selection of drug-resistant bacteria. Fidaxomicin is bactericidal to C. difficile and has a low propensity for resistance development with no cross-resistance to existing antibiotics. Fidaxomicin shows minimal systemic absorption following oral administration in preclinical studies and humans.

Lastest Price from FidaxoMicin manufacturers

  • FidaxoMicin
  • US $2.00 / kg
  • 2019-07-06
  • CAS:873857-62-6
  • Min. Order: 1kg
  • Purity: 99%
  • Supply Ability: 100kg
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