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. {| class="wikitable"
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! Pyrogallol
! Hydroxyquinol 
! Phloroglucinol
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| Benzene-1,2,3-triol
| Benzene-1,2,4-triol
| Benzene-1,3,5-triol
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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. See also
 Dihydroxybenzenes
 Tetrahydroxybenzenes
 Pentahydroxybenzene
 Hexahydroxybenzene

References