A new type of bleomycin group antibiotic, SF-1961 was isolated from the fermentation broth of Streptomyces species. SF-1961 possessed beta-amino-beta-(4-amino-6-carboxypyrimidin-2-yl)-propionic acid instead of its 5-methyl derivative which was a common component of bleomycins and phleomycins.

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http://dx.doi.org/10.7164/antibiotics.33.1243DOI Listing

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