Ключевые слова: adenosine, alkaloid, atomic, atoms, caffein, caffeinated, caffeine, chemical, chemistry, coffee, coffeine, cola, composition, compound, decaffeinated, decaffeination, dependence, drawing, drink, energy, flat, formula, guarana, icon, intoxication, jitters, kola, line, molecular, molecule, receptor, skeletal, soft, stimulant, structure, tea, withdrawal, xanthine, yerba,