Journal
JOURNAL OF ANTIBIOTICS
Volume 55, Issue 2, Pages 165-171Publisher
JAPAN ANTIBIOT RES ASSN
DOI: 10.7164/antibiotics.55.165
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Stachyflin and acetylstachyflin, produced by Stachybotrys sp. RF-7260, were found to have potent anti-influenza A virus activity. Stachyflin is a new class of hemagglutinin fusion inhibitors of influenza A virus. Several derivatives were synthesized from acetylstachyflin and subjected to preliminary examination of their structure-activity relationships. Among them, the 3-oxo and 3,8'-dioxo derivatives showed potent antiviral activity similar to stachyflin. The 3-epi derivative was four times less active than stachyflin. Modification of the 6'-hydroxy group and the C-5' position markedly diminished the antiviral activity.
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