Xanthines

Methylxanthines - Includes chemical constituents of chocolate and coffee

Children:

• 8-Chlorotheophylline (8-Chloro-1,3-dimethyl-2,6(1H,3H)-purinedione)
• Caffeine (1,3,7-trimethylxanthine)
  The most popular psychoactive drug in the world. Use of this stimulant is encouraged in most workplaces, although it can be physically addictive.
• Theobromine (3,7-dimethylxanthine)
  produced by cocoa beans; present in all chocolate products
• Theophylline (3,7-dihydro-1,3-dimethyl-1H-purine-2,6-dione; 1,3-dimethylxanthine)