Term Name:	extended quinone
Synonyms:	extended quinones
Definition:	Compounds having a fully conjugated cyclic dione structure derived from ring assembly or polycyclic aromatic compounds by conversion of an even number of ‒CH= groups into ‒C(=O)‒ groups with any necessary rearrangement of double bonds (polycyclic and heterocyclic analogues are included).
Ontology:	ChEBI [CHEBI:65013]  ( EBI )