TQ -->
tocopherolquinone
medical dictionary

An oxidised tocopherol, formed from the isomeric 2-methyl-2-phytyl-6-chromenol with methyl groups in one or more of positions 5,7, and 8, by migration of H atom from 6-OH to C-4, which yields a 1,4-benzoquinone. Abbreviated TQ and preceded by alpha-, beta-, etc., as in the tocopherols, to indicate degree of methylation.

Synonyms: tocopherylquinone.

Abbreviation: TQ

(05 Mar 2000)