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Polyporic acid is a terphenyl benzoquinone compound first identified by German chemist Stahlschmidt from a mycelial culture of the fungus species Hapalopilus nidulans in 1877. This chemical, present at 20–40% of the fresh weight of the fruit bodies, inhibits the enzyme dihydroorotate dehydrogenase. It is found in other mushrooms, but in much lower amounts. Polyporic acid has some antifungal and antibacterial activity. It has been shown to be an intermediate in the biosynthesis of allantofuranone, a gamma-lactone antibiotic from the black rot fungus Allantophomopsis lycopodina.
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Polyporic acid Wikipedia(Text) CC BY-SA