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Kotanin is a metabolite of Aspergillus glaucus[1].

ChEBI: A member of the class of 8,8'-bicoumarins resulting from the formal oxidative dimerisation of 4,7-dimethoxy-5-methyl-2H-chromen-2-one (the S-(+) enantiomer). A fungal metabolite, its isolation from Aspergillus clav tus was first reported in 1971.

Microbial Metabolite

[1] Büchi G, et, al. Structure and synthesis of kotanin and desmethylkotanin, metabolites of Aspergillus glaucus. J Org Chem. 1971 Apr 23;36(8):1143-7. DOI:10.1021/jo00807a028