Exercise 31

Logo Avogadro

If you have not already done so, download Avogadro for free and watch the tutorials if necessary.

Caffeine is metabolized by the liver and it is transformed in three different compounds:

  • paraxanthine, 84% yield, a metabolite which stimulates lipolysis and increases the concentration of glycerol and fatty acids in the blood;
  • theobromine, 12% yield, a vasodilator. Its action increases the flow of oxygen to the brain and muscles;
  • theophylline, 4% yield, which increases the heart rate and alters the strength of muscle contraction

Launch Avogadro and open three pages. Import the caffeine molecule and its metabolites (sequence File→ import→ fetch by chemical name). Compare the molecules and their structures. By comparing their molecular mass (sequence View → Properties), what do you notice?

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