HOOC(CH2)4COOH\mathrm{HOOC}\left(\mathrm{CH}_{2}\right)_{4} \mathrm{COOH}HOOC(CH2)4COOH
CH3CH2OH\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}CH3CH2OH
CH3COOH\mathrm{CH}_{3} \mathrm{COOH}CH3COOH
CH3OH\mathrm{CH}_{3} \mathrm{OH}CH3OH