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Structures of selected bioactive benzoxazoles, and benzoxazole formation in nataxazole biosynthesis. A) Bioactive benzoxazoles with meta‐ (red) and ortho‐substituted (blue) heterocycles. In the case of natural products, the bacterial producer strain is named. B) Benzoxazole ring formation in nataxazole biosynthesis from fusion of two 3‐HAA units leads to an ortho‐substituted heterocycle.
