![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/a/a3/9H-Purine.svg/640px-9H-Purine.svg.png&w=640&q=50)
Purinones
From Wikipedia, the free encyclopedia
Purinones (oxopurines) are derivatives of purine which have a substituted keto group.[1]
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/a/a3/9H-Purine.svg/220px-9H-Purine.svg.png)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/3/38/Xanthin_-_Xanthine.svg/220px-Xanthin_-_Xanthine.svg.png)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/c/cf/Hypoxanthin_-_Hypoxanthine.svg/220px-Hypoxanthin_-_Hypoxanthine.svg.png)
Most are divided into 2 families:
Purinones form the central core of numerous pharmaceutical drugs used in a variety therapeutic areas.[2]