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A novel antiherpetic agent, fattiviracin A1, was isolated from the culture broth of strain No. 2445 identified as Streptomyces microflavus. It was purified through 1-butanol extraction, column chromatographies on Diaion HP-10 and silica gel and HPLC using a reverse phase column. The structure of fattiviracin A1 was determined by several spectroscopic experiments and chemical degradations. It is a new macrocyclic diester consisting of four D-glucose units and two (C24 and C33) hydroxy fatty acids. It is closely related to cycloviracins B1 and B2, but differs from these known compounds in both the length of its side chain and the sugar moiety.

journal of antibiotics

Fattiviracin A1, a Novel Antiherpetic Agent Produced by Streptomyces microflavus Strain No. 2445. I. Taxonomy, Fermentation, Isolation, Physico-chemical Properties and Structure Elucidation.