Ключевые слова: 3d, atom, atomic, ball, biology, bond, c8h10n4o2, caffein, carbon, chemical, chemistry, coffein, education, elements, geometry, hydrogen, medical, methylxantine, model, molecule, nutrition, organic, oxygen, pharmaceutical biochemistry, psychoactive, purine, research, ring, science, scientific, spheres, stick, stimulant, structure, visualization,