Sentence Examples


  • The principal chemicals in tea are: caffeine, tannin and essential oil.
  • The chief of these are coffee or caffeine and atropine.
  • Caffeine (formerly known as theme) is the alkaloid of tea, and is identical with that of coffee, guarana, mate and kola nut.
  • It often relieves neuralgia, especially when combined with caffeine and quinine.
  • Dimethylparabanic acid (cholesterophane), C0[NCH 3 C0] 2, is formed by oxidizing caffeine or by methylating parabanic acid.