Naphthoquinol

Part of speech: noun

Definitions

1. An organic compound consisting of a naphthalene ring system bonded to two hydroxyl groups and two ketone groups, often involved in biological redox reactions
2. A chemical substance formed by the reduction of naphthoquinone, characterized by a fused bicyclic aromatic structure with hydroxyl functional groups replacing carbonyl oxygen atoms
3. A class of molecules derived from naphthoquinone that feature a dihydroxy naphthalene framework, commonly studied for their roles as electron carriers in metabolic processes

Etymology: Naphtha is the oldest part of this name. Ancient Greek "naphtha" referred to a flammable, oily substance, and it is often traced to the Persian "naft." Naphthalene, the aromatic compound of two fused rings, takes its name from that root, and naphthoquinone is naphthalene with a quinone group added. Quinone gets its name from quinine, the bark-derived drug. Quinine came from the bark of the cinchona tree, and its name traces to the Quechua word "kina," meaning bark. Chemists then attached the "-one" ending used for ketones to make quinone. The final "-ol" in naphthoquinol comes from "alcohol," and chemists use it to name reduced forms of a parent compound. Quinol was used for the reduced form of quinone in the same way, so this is a systematic coinage built from its parts rather than a traditional name.