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.[1]
Pyrogallol Hydroxyquinol Phloroglucinol Benzene-1,2,3-triol Benzene-1,2,4-triol Benzene-1,3,5-triol 
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.[2][3]
