CH3−OH\mathrm{CH}_{3}-\mathrm{OH}CH3−OH
C2H5−OH\mathrm{C}_{2} \mathrm{H}_{5}-\mathrm{OH}C2H5−OH
CH3−CHO\mathrm{CH}_{3}-\mathrm{CHO}CH3−CHO
CH3−CO−CH3\mathrm{CH}_{3}-\mathrm{CO}-\mathrm{CH}_{3}CH3−CO−CH3
