Isocoumarins. 1-Isochromen-1-ones . 1H-2-Benzopyran-1-ones . Compounds that differ from COUMARINS in having the positions of the ring and ketone oxygens reversed so the keto oxygen is at the 1-position of the molecule. . 0.61
Benzoquinones. 2,5-Cyclohexadiene-1,4-Diones . o-Benzoquinones . p-Benzoquinones . Benzodiones . 1,2-Benzoquinones . 1,4-Benzoquinones . Benzene rings which contain two ketone moieties in any position. They can be substituted in any position except at the ketone groups. . 0.59