Ключевые слова: alkaloid, atomic, atoms, background, caffeinated, caffeine, caffeine dependence, caffeine molecule, caffeine structure, chemical, chemical formula, chemistry, coffee, composition, compound, decaffeinating, dependence, design, drawing, drink, drug, energy, energy drinks, formula, gold black, guarana, hydrogen, illustration, intoxication, laboratory, line, medicine, methylxanthine alkaloid, molecular, molecule, nitrogen, oxygen, psychoactive, receptor, research, science, stimulant, structure, symbol, tea, technology, theine, wakefulness, xanthine,