From the culture of Pseudomoms sp. 267 obtained from the rhizosphere of Triticum pseudobactin and pseudobactin A were isolated. These two compounds are the pyoverdins typical for Pseudomom jluorescens, which establishes the identity of the strain. In addition, two ,novel compounds were found in the cultural broth, viz. two 7 sulfonic acid derivatives of pseudobactin A. Their structure elucidation and biogenetic implications will be presented.