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HPLC profiling of microbial cultures. Chromatographic profiles of extracts from A. nidulans WT (a), A. nidulans WT coincubated with S. hygroscopicus (b), and orsA deletion strain cocultured with S. hygroscopicus (c). Structures of OA (1), OA-derived lecanoric acid (2), F-9775A (3), and F-9775B (4).
