[Pseudobactin and pseudobactin A variants: new pyoverdin type peptide siderophores from Pseudomonas fluorescens "E2"]

From a strain of Pseudomonas fluorescens pseudobactin and several related compounds were isolated and their structures were elucidated. In this way a reference compound (5) could be obtained for the unambiguous determination of the absolute configuration of C-1 of the pyoverdin chromophore in newly isolated representatives of this class.