![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/a/a2/Indol-5%252C6-chinon.svg/640px-Indol-5%252C6-chinon.svg.png&w=640&q=50)
Indolequinones
From Wikipedia, the free encyclopedia
Indolequinones are molecules which are based upon an indole but have two additional ketone groups (quinone) attached to the ring structure.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/a/a2/Indol-5%2C6-chinon.svg/220px-Indol-5%2C6-chinon.svg.png)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/8/8f/Mitomycin.svg/320px-Mitomycin.svg.png)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/3/3d/Apaziquone.svg/320px-Apaziquone.svg.png)
This simple indolequinone indole-5,6-quinone is produced during the ripening of some fruit.
Other examples of indolequinones and the related mitosenes include natural compound mitomycin and the related chemotherapeutic agent apaziquone.