Caffeine (also known as Guaranine, 1,3,7-Trimethylxanthine, Methyltheobromine, Theine, Thein, Cafeina, Koffein, Mateina, Alert-pep or Caffein) is a stimulant substance of the xanthine class.
Chemistry
Caffeine is typically found in the form of its citrate, salicylate and monohydrate salts.