ANTIBIOTIC PA-31088-IV, ITS SALTS WITH BASES, A PROCESS FOR ITS MANUFACTURE, PHARMACEUTICAL COMPOSITIONS CONTAINING THIS ANTIBIOTIC, STREPTOMYCES TOKUNONENSIS PA-31088 AND ITS MUTANTS

摘要

A new antibiotic having beta -lactamase inhibitory activity, PA-31088-IV, being useful as a medicament and a veterinary drug for inhibiting the growth of gram-positive and gram-negative phathogenic microorganisms and a process for preparing the same, being characterized by cultivating Streptomyces tokunonensis sp. nov. in a suitable medium and recovering PA-31088-IV from the cultured broth.