CH3OH\mathrm{CH}_{3} \mathrm{OH}CH3OH
HCOOH\mathrm{HCOOH}HCOOH
CH3COOH\mathrm{CH}_{3} \mathrm{COOH}CH3COOH
CH3CH2OH\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}CH3CH2OH