CH3−CO−CH2−CO−CH3\mathrm{CH}_{3}-\mathrm{CO}-\mathrm{CH}_{2}-\mathrm{CO}-\mathrm{CH}_{3}CH3−CO−CH2−CO−CH3
CH3−COO−COO−CH3\mathrm{CH}_{3}-\mathrm{COO}-\mathrm{COO}-\mathrm{CH}_{3}CH3−COO−COO−CH3
CH3−COO−CO−CH3\mathrm{CH}_{3}-\mathrm{COO}-\mathrm{CO}-\mathrm{CH}_{3}CH3−COO−CO−CH3
CH3−CH2−O−CH2−CH3\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{O}-\mathrm{CH}_{2}-\mathrm{CH}_{3}CH3−CH2−O−CH2−CH3
