C6H6\mathrm{C}_{6} \mathrm{H}_{6}C6H6
CHCl3\mathrm{CHCl}_{3}CHCl3
CCl4\mathrm{CCl}_{4}CCl4
CH3CH2Cl\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Cl}CH3CH2Cl