Naphthoquinones

thumb|right|upright|Chemical structure of 1,4-naphthoquinone Naphthoquinones constitute a class of organic compounds (quinones) structurally related to naphthalene. The 1,2- and 1,4-isomers are common but others exist: 1,2-Naphthoquinone 1,4-Naphthoquinone

Xylindein is a quinone pigment, a dimeric naphthoquinone derivative. It is produced by fungi in the genus Chlorociboria. This pigment causes green staining of wood infected by the fungi.