Circumdatin F is a fungal quinazolinobenzodiazepine alkaloid studied in antiviral research.
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Circumdatin F is a quinazolino[3,2-a][1,4]benzodiazepinedione alkaloid isolated from Aspergillus species. It has been reported to inhibit the final stage of hepatitis C virus polyprotein processing and exhibits activity in antifouling models by modulating marine microbial community composition. Structurally, it contains fused quinazolinone and benzodiazepinone moieties typical of fungal benzodiazepine alkaloids. Circumdatin F serves as a useful scaffold for studying antiviral mechanisms and environmentally friendly antifouling strategies.