CH3OH\mathrm{CH}_{3} \mathrm{OH}CH3OH
C2H5OH\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}C2H5OH
CH3COOH\mathrm{CH}_{3} \mathrm{COOH}CH3COOH
CH3−CO−CH3\mathrm{CH}_{3}-\mathrm{CO}-\mathrm{CH}_{3}CH3−CO−CH3