naphthoquinone

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naph·tho·quin·one

(naf'thō-kwin'ōn),
1. A quinone derivative of naphthalene, reducible to naphthohydroquinone; 1,4-naphthoquinone derivatives have vitamin K activity (for example, menaquinone).
2. A class of compounds containing the naphthoquinone (1) structure.