Ciclopirox ethanolamine - CAS 41621-49-2

Ciclopirox ethanolamine (Ciclopirox olamine, HOE 296) (CAS 41621-49-2) is a broad-spectrum antifungal agent working as an iron chelator.

Ciclopirox significantly inhibits the growth of C. albicans strain SC5314 cells, with MIC80s of 1.0-2.0 μg/mL, growth decreased dramatically at the concentrations of >0.6 μg/mL, and almost complete growth inhibition at concentration of 0.7 μg/mL, unlike fluconazole which shows a much wider range of concentrations with intermediate inhibition. Like iron chelator bipyridine, Ciclopirox reduces cell growth by binding to iron ions, which can be reversed by addition of FeCl3. Moreover, Ciclopirox treatment at subinhibitory concentration (0.6 μg/mL) only moderately reduces the virulence genes such as genes encoding secreted proteinases or lipases, but leads to a distinct up- or down-regulation of genes encoding iron permeases or transporters (FTR1, FTR2, and FTH1), a copper permease (CCC2), an iron reductase (CFL1), and a siderophore transporter (SIT1). Although the Candida drug resistance genes CDR1 and CDR2 are up-regulated after Ciclopirox treatment, no change in resistance or increased tolerance could be observed even after an incubation period of 6 months, in contrast to fluconazole in which the MICs for cells noticeably increase after 2 months.

Catalog Number: A000713

CAS Number: 41621-49-2

PubChem Substance ID:355037938

Molecular Formula: C12H17NO2.C2H7NO

Molecular Weight:268.35

Purity: ≥95%

* For research use only. Not for human or veterinary use.


SynonymsCiclopirox ethanolamine; ciclopiroxolamine; Ciclobirox Olamine


Molecular Formula: C12H17NO2.C2H7NO
Molecular Weight268.35
SolubilitySoluble in DMSO > 10 mM
Storage3 years -20C powder

Computed Descriptor

IUPAC Name2-aminoethanol;6-cyclohexyl-1-hydroxy-4-methylpyridin-2-one