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Cyclohexenes
Six-carbon alicyclic hydrocarbons which contain one or more double bonds in the ring. The cyclohexadienes are not aromatic, in contrast to BENZOQUINONES which are sometimes called 2,5-cyclohexadiene-1,4-diones.
Year introduced: 2007
Benzoquinones
Benzene rings which contain two ketone moieties in any position. They can be substituted in any position except at the ketone groups.
Year introduced: 1991
capsorubin [Supplementary Concept]
RN given refers to (3S,3'S,5R,5'R)-isomer; a carotenoid with cyclopentane rings instead of cyclohexenes;
Date introduced: October 1, 1982
capsanthin [Supplementary Concept]
carotenoid pigment with cyclopentane rings instead of cyclohexenes; isolated form paprika & pimientos; RN given refers to (3R,3'S,5'R)-isomer; biosynthesized from violaxanthin
Date introduced: January 1, 1974