Trihydroxybenzenes

The trihydroxybenzenes (or benzenetriols) are organic compounds with the formula C₆H₃(OH)₃. Also classified as polyphenols, they feature three hydroxyl groups substituted onto a benzene ring. They are white solids with modest solubility in water.{{cite encyclopedia|author=Helmut Fiege |author2=Heinz-Werner Voges |author3=Toshikazu Hamamoto |author4=Sumio Umemura |author5=Tadao Iwata |author6=Hisaya Miki |author7=Yasuhiro Fujita |author8=Hans-Josef Buysch |author9=Dorothea Garbe |author10=Wilfried Paulus |encyclopedia=Ullmann's Encyclopedia of Industrial Chemistry|year=2002|publisher=Wiley-VCH|location=Weinheim|doi=10.1002/14356007.a19_313|isbn=978-3-527-30673-2 |chapter=Phenol Derivatives }}

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The enzyme pyrogallol hydroxytransferase uses benzene-1,2,3,5-tetrol and benzene-1,2,3-triol (pyrogallol), whereas its two products are benzene-1,3,5-triol (phloroglucinol) and benzene-1,2,3,5-tetrol. This enzyme can be found in Pelobacter acidigallici.{{ cite web | url = https://www.uniprot.org/uniprot/P80564 | title = P 80564 Pyrogallol hydroxytransferase small subunit | work = UniProtKB | publisher = Uniprot }}{{ cite journal | title = Fermentation of trihydroxybenzenes by Pelobacter acidigallici gen. nov. sp. nov., a new strictly anaerobic, non-sporeforming bacterium |author1=Schink, B. |author2=Pfennig, M. | journal = Archives of Microbiology | volume = 133 | issue = 3 | date = December 1982 | pages = 195–201 | doi = 10.1007/BF00415000 |s2cid=15717780 |url=http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-25092 }}