Cohaerins G-K, azaphilone pigments from Annulohypoxylon cohaerens and absolute stereochemistry of cohaerins C-K

Four azaphilones named cohaerins G, H, I and K were isolated from the xylariaceous fungus Annulohypoxylon cohaerens. The structures and stereochemistry of the metabolites were determined together with that of cohaerins C-F.