Naphthoquinones constitute a class of organic compounds (quinones) structurally related to naphthalene. The 1,2- and 1,4-isomers are common but others exist:
Many natural products feature naphthoquinones, especially the 1,4 isomer.
Amine-substituted naphthoquiones, e.g. Artisil Blue GFL and Helindon Yellow R, were once used as dyes. Some interest remains in this area.