MACROLACTAMS - 2 NOVEL HOMOLOGOUS SERIES OF COMPOUNDS PRODUCED BY ACTINOMADURA SP SCC-1778

Eight antifungal compounds were identified from the fermentation of Actinomadura sp. SCC 1778. This culture produces four homologous compounds (C22H42N2O5 approximately C25H48N2O5) containing the sugar,mycosamine,and four homologous compounds (C22H42N2O5 approximately C25H48N2O5) containing the sugar, 3,6-dideoxy-3-amino-L-talopyranose. Five of the compounds identified were novel macrolactams. All these compounds exhibit antifungal activity against Candida spp. with geometric mean MICs ranging from approximately 1.0-mu-g/ml for the higher homologs to 30-mu-g/ml for the lower homologs.