Hydroxylated @C01497@ containing at least three hydroxy groups, each attached to a different ring carbon atom.
Sources: PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1330 [Terms] [Paper] White Book, 2nd ed., p. 196 [Terms] [Book]