Xanthine calculus

What is xanthine?

Xanthines are simple organic bases and are considered the basis of purine metabolism. All tissues of living organisms contain a certain amount of this substance. Xanthine itself does not have pronounced properties, but it is involved in biochemical reactions.

2,6-xylurethanedehyde

Also known by the trade name purine. Used as a food coloring in amounts up to 4 mg per kilogram of product. A solution of xanthine in purified castor oil is a food additive E151 (also called “puratan” and “xanthoiarin”) and should not be consumed