Quinones

Compounds having a fully conjugated cyclic dione structure, such as that of benzoquinones, derived from aromatic compounds by conversion of an even number of number of -CH= groups into -C(=O)- groups with any necessary rearrangement of double bonds (polycyclic and heterocyclic analogues are included).

Organic compounds -> Organic oxygen compounds -> Organooxygen compounds -> Carbonyl compounds -> Ketones -> Cyclic ketones