| 摘要 |
<p>This invention provides a process for the preparation of salts of the beta -lactamase inhibitory antibiotics MM4550A, MM13902 and MM17880, which are the compounds of the formulae (I)-(III), respectively: <IMAGE> (I) <IMAGE> (II) <IMAGE> (III) which process comprises cultivating a strain of Streptomyces gedanensis and isolating a salt of at least one of MM4550A, MM13902 and MM17880.</p> |
