Structure–activity relationship studies on niphimycin, a guanidylpolyol macrolide antibiotic. Part 1: The role of the N-methyl-N″-alkylguanidinium moiety

Bioorganic & Medicinal Chemistry Letters
2006.0

Abstract

Several N-methyl-N''-alkylguanidinium derivatives were synthesized and used as simplified analogues of niphimycin (NM), a guanidylpolyol macrolide, in structure-activity relationship studies. The C16-alkylated derivative exerted fungicidal activity by directly damaging the fungal plasma membrane and inducing oxidative stress in a manner similar to niphimycin. These results indicate that the N-methyl-N''-alkylguanidinium moiety is required for antifungal activity by NM.

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