LL-F42248.ALPHA., a novel chlorinated pyrrole antibiotic.

Abstract

Culture LL-F42248, preliminarily identified as an unusual Streptomyces species, was found to produce the novel antibiotic 1, designated LL-F42248a.This compound, which is related to the coproduced pyrrolomycin C (2)i:) is the first tricyclic member of this family and is the