SAMAROSPORIN, A NEW PEPTIDE ANTIBIOTIC

I. FERMENTATION, ISOLATION AND CHARACTERIZATION

Abstract

A new antibiotic, samarosporin, was isolated in a crystalline state from a mycelial extract of a strain of Samarospora species (an ascomycete). Samarosporin is a neutral cyclopeptide and has a molecular formula of C₇₂H₁₁₁N₁₅O₁₉. Samarosporin shows a broad antimicrobial activity against various test microorganisms.