CH3OH\mathrm{CH}_{3} \mathrm{OH}CH3OH
CH3−CHO\mathrm{CH}_{3}-\mathrm{CHO}CH3−CHO
CH3CH2OH\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}CH3CH2OH
CH3−CO−CH3\mathrm{CH}_{3}-\mathrm{CO}-\mathrm{CH}_{3}CH3−CO−CH3