CAS 168110-44-9: Micafungin FR-179642

Applications FR 179642 is an impurity of Micafungin (M342350), a lipopeptide compound that acts as an antifungal agent with activity against Aspergillus and Candida species. References Denning, D., et al.: J. Infection, 53, 337 (2006); Queiroz-Telles, F., et al.: Pediatr. Infect. Dis. J., 27, 820 (2008)

FR179642 is a key intermediate for making Micafungin, a drug from the echinocandin class.

Micafungin is an antifungal drug that inhibits the synthesis of ergosterol, a vital component of fungal cell membranes. It is a cyclic peptide with a lipophilic fatty acid chain that has been modified to allow penetration into cells. Micafungin is active against Candida and Aspergillus species and has shown activity against some strains of Cryptococcus neoformans. The MIC (minimum inhibitory concentration) for this drug ranges from 0.06 to 1 microgram/mL, depending on the bacterial strain being tested. Micafungin FR-179642 impurity (acid) is an impurity in micafungin that can be present as trace amounts in the final product and may contribute to hemolytic activity. This impurity is formed by hydrolysis during the synthesis process.