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Anhydroophiobolin A is an ophiobolin fungal metabolite that has been found in C. heterostrophus fermentation broths. It is cytotoxic to HepG2 and K562 cancer cells (IC₅₀s = 55.7 and 39.5 μM, respectively).

3-Anhydroophiobolin A is the dehydrated analogue of ophiobolin A and is a major member of the ophiobolin complex of phytotoxic metabolites produced by many species of the genus Bipolaris. Like all ophiobolins, 3-anhydroophiobolin A possesses a broad biological profile with antibacterial, antifungal, antitumour, herbicidal and nematocidal activities.

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