Ключевые слова: 2d, abstract, agent, aromatic, atom, atomic, background, benzene, bond, carbon, chain, chemical, chemistry, compound, connect, connection, element, formula, hydrocarbon, icon, inhale, isolated, lab, laboratory, link, liquid, methyl, methylbenzene, model, molecular, molecule, oil, organic, science, sign, skeletal, solvent, stick, structural, structure, substance, symbol, toluen, toluene, toluol, white,